Frequently Asked Questions

A rooftop unit (RTU) is a self-contained "packaged" system where the compressor, coils, blower, and controls all sit in one cabinet on the roof, ducting conditioned air straight down into the space below. A commercial split system separates the condenser (outside) from the air handler (inside), connected by refrigerant lines. RTUs dominate strip malls, offices, and restaurants because they save floor space and are easy to service from the roof, while splits are used where roof loading or layout won't allow a packaged unit. RTUs run hard and are exposed to full sun and weather, so they need more frequent maintenance than a comparable split.

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A single-zone commercial RTU replacement in the Bay Area typically runs about $8,000 to $20,000 for a 3–7.5 ton unit installed, and larger 10–25 ton units can reach $25,000 to $60,000+ depending on tonnage, efficiency, crane/rigging costs, and curb adapters. Crane rental to hoist the old unit off and set the new one is often $1,500 to $4,000 on its own. High-rise access, economizer or controls integration, and Title 24 code upgrades push the number higher. Getting a load calculation first matters, because guessing the tonnage off the old nameplate often carries over a sizing mistake.

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A commercial HVAC preventive maintenance contract typically includes scheduled visits (often quarterly, sometimes monthly for critical systems) where a tech cleans coils, changes or cleans filters, checks refrigerant charge and superheat, inspects belts and bearings, tightens electrical connections, tests capacitors and contactors, verifies economizer operation, checks safeties, and clears condensate drains. Most contracts also give you priority emergency response and discounted repair rates. The point is catching worn parts before they fail during a heat wave, which is far cheaper than an emergency shutdown. Cool Aid services commercial HVAC across San Jose, Santa Clara, and the wider Bay Area and can tailor a plan to how critical your equipment is.

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Commercial HVAC is built for far bigger loads, longer runtimes, and code requirements that residential systems don't face. Commercial units use higher tonnage, often 3-phase power, packaged rooftop configurations, economizers for free cooling, and building-management controls, and they must handle heavy occupancy, kitchen or server heat, and fresh-air ventilation minimums. They also cycle far more hours per day, so wear happens faster and maintenance is non-optional. In California, commercial replacements also trigger Title 24 requirements that don't apply the same way to homes, which is one reason commercial work requires the right licensing and experience.

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An oversized commercial unit short-cycles, meaning it blasts cold air, satisfies the thermostat fast, and shuts off before it can pull humidity out of the air, leaving the space cold-but-clammy and uneven. The constant start-stop wears out compressors and contactors early, spikes energy use, and creates hot and cold spots across the floor. Undersized units have the opposite problem, running nonstop and never catching up on hot days. The fix is a proper load calculation (Manual N / block load) rather than matching the old nameplate, which is why a good contractor measures the actual building load before quoting a replacement.

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It depends on your lease, but under a typical triple-net (NNN) commercial lease the tenant is responsible for HVAC maintenance and repairs on the unit serving their space, while the landlord may cover full replacement or the building's structural systems. Many leases cap tenant repair exposure or require the landlord to carry a maintenance contract, so read the HVAC clause carefully. A common trap: a landlord hands over a unit that was never maintained, then holds the tenant liable for a compressor failure months later. Getting a move-in inspection and a documented maintenance plan protects both sides.

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An economizer is a set of motorized dampers on a rooftop unit that pulls in cool outside air for "free cooling" when conditions allow, instead of running the compressor. In a mild Bay Area climate this is genuinely valuable, because there are many hours where 60–65°F outdoor air can cool an office without mechanical cooling at all, cutting energy costs significantly. The catch is that economizer dampers and their controls fail quietly, stuck open (wasting energy and letting in hot or smoky air) or stuck closed (defeating the savings), and Title 24 requires them on many commercial units. Checking economizer operation is a standard part of commercial preventive maintenance.

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Usually it's a make-up air and exhaust imbalance, not a broken AC. Commercial kitchen hood exhaust fans pull huge volumes of air out of the building, and if the make-up air unit that replaces it is undersized, failed, or shut off, the kitchen goes negative-pressure and sucks hot air from everywhere while your dining-room AC can't keep up. Add the radiant heat from cooking lines and an under-tonned rooftop unit, and the space never catches up. The fix starts with verifying the make-up air unit and exhaust are balanced, then confirming the AC is correctly sized for the kitchen's heat load. This is one of the most common HVAC complaints Cool Aid sees in Bay Area restaurants.

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As a rule of thumb, replace rather than repair when the RTU is past 15 years old, uses phased-out R-22 refrigerant, has a failed compressor, and the repair would cost more than a third to half of a new unit. A single failed capacitor or contactor on a 7-year-old unit is an easy repair; a compressor burnout on a 17-year-old R-22 unit is a replacement, because you're pouring money into obsolete equipment with expensive refrigerant. Also weigh energy savings, since a modern high-efficiency RTU can meaningfully cut runtime hours in a heavy-use commercial space. A load calculation at replacement time also lets you correct any sizing issues carried over from the original install.

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Yes, if downtime is expensive, a server or IT room should have redundant cooling, commonly an N+1 setup where a second unit can carry the load if the primary fails. Servers generate heat 24/7 with no "off" hours, and a single cooling failure can push a rack past safe temperatures in minutes, triggering shutdowns or hardware damage. Dedicated cooling also matters because comfort-office AC often shuts off nights and weekends exactly when the room still needs cooling. Cool Aid designs and services commercial server-room cooling across Silicon Valley, where a lot of tenants run mission-critical equipment that can't tolerate a cooling outage.

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Yes. Replacing a commercial HVAC unit in California generally requires a building permit, and the work must meet Title 24 energy standards, which can trigger requirements like economizers, higher minimum efficiency, refrigerant charge verification, and duct/economizer testing depending on the scope. Pulling the permit and passing inspection matters because unpermitted mechanical work can surface during a sale, lease audit, or insurance claim. A licensed contractor handles the permit and Title 24 paperwork as part of the job. Cool Aid holds California C-20 (HVAC) and C-38 (commercial refrigeration and A/C) licenses for this kind of work.

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A walk-in cooler should hold at 35–38°F, keeping product below the 41°F food-safety line, and a walk-in freezer should sit at 0°F or colder, typically -10 to 0°F. Those targets exist because bacteria multiply fastest in the 41–135°F "danger zone," so a cooler drifting to 45°F puts food safety and your health inspection at risk. If your cooler can't hold temperature, the usual suspects are a dirty condenser coil, low refrigerant, failing door gaskets, or an iced-up evaporator. A remote temperature monitor with alarms is cheap insurance against losing a full box of product overnight.

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Frost buildup on the evaporator coil or ceiling usually means a defrost problem or an air leak. The most common causes are a failed defrost timer, heater, or termination sensor that lets the coil ice over instead of clearing on schedule, or warm humid air sneaking in through worn door gaskets, a propped door, or a failed door heater. As ice grows it blocks airflow across the coil, so the freezer gets warmer even though the compressor runs constantly. Ignoring it leads to a full coil block and a warm-up event. If you're clearing ice by hand more than occasionally, the defrost cycle or door seal needs a service call.

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The number-one killer is a dirty condenser coil, which makes the compressor run hotter and harder until it burns out; other common causes are low refrigerant from a leak, electrical faults, liquid slugging, and overheating from poor airflow or a failed condenser fan. Compressors are the most expensive single component in a refrigeration system, so a failure is often the deciding factor between repairing and replacing a unit. When Cool Aid replaces a refrigeration compressor, they always clean the condenser coil at the same time, because the dirty coil is usually what killed the old compressor and skipping that step just burns out the new one too. Regular coil cleaning is the cheapest way to protect a compressor.

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Replacing a commercial refrigeration compressor typically runs about $1,500 to $4,000 installed depending on horsepower and refrigerant, while swapping a full condensing unit for a walk-in commonly lands around $3,000 to $8,000+. Cost drivers include the tonnage, whether it's low-temp (freezer) or medium-temp (cooler), the refrigerant type, and how accessible the equipment is. On an older unit it's often smarter to replace the whole condensing unit than to keep repairing an aging compressor. Whoever does the work should clean the condenser coil as part of the job, since a dirty coil is the usual reason the original compressor failed.

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The most common reasons a reach-in cooler won't hold temperature are a dirty condenser coil, worn door gaskets, blocked airflow from overpacked shelves, or a failing evaporator fan. Reach-ins pull air through a coil usually at the bottom or top, and when that coil is clogged with grease and dust, or the door seal lets warm kitchen air leak in, the unit runs constantly and still drifts warm. Blocking the interior vents with product has the same effect. Start by cleaning the condenser coil and checking the gaskets; if it still won't cool, it's likely low refrigerant or a component failure that needs a tech. Cool Aid is factory-authorized on True, Traulsen, Turbo Air, and other major reach-in brands.

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Plan to inspect walk-in and reach-in door gaskets every few months and replace them roughly every 1–3 years, sooner if they're cracked, torn, or no longer sealing. A quick test: close the door on a dollar bill and try to pull it out, and if it slides free easily the gasket is leaking. Bad gaskets are one of the most overlooked energy and food-safety problems, because they let warm humid air in, which drives up runtime, causes frost and condensation, and can push the box out of safe temperature. Gasket replacement is inexpensive compared to the compressor wear and spoiled product that a leaking door causes over time.

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The condensing unit is the part of a refrigeration system that houses the compressor and condenser coil and rejects the heat pulled out of the cold box. On a walk-in it comes in three configurations: self-contained (mounted right on top of the box), remote (sitting outside or on the roof with refrigerant lines run to the evaporator inside), or a matched split. Remote condensing units are common for larger walk-ins because they move compressor heat and noise out of the kitchen and are easier to service. Wherever it sits, the condenser coil must stay clean and have clear airflow, because a choked coil is the leading cause of compressor failure.

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First, keep the door shut to hold cold as long as possible, move the most perishable product to another cooler or backup unit, and log temperatures so you can document food safety for the health department. A full walk-in can hold safe temperature for a few hours if kept closed, but once product crosses 41°F you're on a clock. Then call for emergency refrigeration service, because a compressor or refrigerant issue won't fix itself and every hour risks a full box of inventory. Cool Aid offers 24/7 emergency refrigeration service across the Bay Area for exactly this situation, since restaurant and grocery downtime is measured in spoiled product and lost revenue.

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HACCP food-safety plans require holding cold food out of the 41–135°F danger zone and documenting it, so continuous refrigeration temperature monitoring gives you the automatic logs and alarms that prove compliance. Instead of hand-writing temps twice a shift, networked sensors record cooler and freezer temperatures around the clock and alert staff by phone or text the moment a unit drifts out of range, often before product is lost. That early warning turns a potential overnight spoilage event into a same-day service call. For restaurants and grocers, pairing monitoring with a preventive maintenance plan is the most reliable way to protect both inventory and your health inspection score.

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Water on a walk-in floor usually traces to a clogged or frozen condensate drain line, a cracked or overflowing drain pan, or excess condensation from door gaskets and defrost problems letting warm humid air in. The evaporator naturally produces water as it defrosts, and that water is supposed to run out through a drain with a heated line so it doesn't refreeze; when the drain clogs or the heater fails, it backs up and spills. Standing water is both a slip hazard and a sign the box is running less efficiently than it should. Clearing the drain and checking the gaskets and defrost cycle usually solves it, but recurring pooling is worth a service diagnosis.

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New commercial refrigeration increasingly uses low-GWP refrigerants like R-290 (propane) in self-contained cases and R-454B in larger systems, as the industry phases down older HFCs like R-410A under federal and California regulations, and legacy systems still running R-22 are effectively obsolete since that refrigerant is no longer produced. This matters when you're deciding to repair or replace, because topping off an old R-22 unit is expensive and a losing bet compared to modern equipment. Handling these refrigerants requires EPA certification, and some like R-290 are mildly flammable and demand trained technicians. Cool Aid is EPA Universal (Section 608) certified and trains on R-32, R-454B, and R-290 alongside the legacy R-410A and R-22 systems still in the field.

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A heat pump moves heat instead of creating it. Even in cold air there's usable heat energy, and the system uses refrigerant and a compressor to absorb that heat outdoors and release it inside — running the same cycle in reverse when you need cooling. Because it transfers heat rather than burning gas, a good heat pump delivers 2-4 units of heat for every unit of electricity, which is why it's far more efficient than a furnace or electric resistance heater.

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Yes — the Bay Area is close to an ideal climate for heat pumps. Winter lows here rarely drop below the high 30s or low 40s, and standard heat pumps run at peak efficiency in exactly that range. You don't even need a cold-climate model for most Silicon Valley and coastal homes, so a properly sized heat pump can comfortably handle 100% of your heating without gas backup. Cool Aid sizes and installs heat pumps throughout San Jose, Santa Clara, and the Peninsula.

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A dual-fuel (hybrid) system pairs a heat pump with a gas furnace, using the efficient heat pump most of the time and automatically switching to gas only on the coldest days. It's designed for climates with hard freezes. In most of the Bay Area you don't need one because it almost never gets cold enough to require the gas backup, so a straight all-electric heat pump usually makes more sense. Dual-fuel can still be worth it if you're keeping an existing furnace or live in a colder inland pocket like Livermore or Morgan Hill.

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Heat pump sizing should be done with a Manual J load calculation, not a rule of thumb, because an oversized unit short-cycles and an undersized one can't keep up. The calculation factors in your square footage, insulation, window area, ceiling height, and local climate — a well-insulated Bay Area home needs less capacity than an older, drafty one. Roughly speaking many homes land between 2 and 5 tons, but the only reliable number comes from a proper load calc. Cool Aid runs the load calculation before quoting so the system is matched to your actual home.

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SEER2 measures a heat pump's cooling efficiency and HSPF2 measures its heating efficiency — higher numbers mean lower energy use. As of 2023 the industry switched from SEER/HSPF to the SEER2/HSPF2 testing standard, which uses higher static pressure to better reflect real-world duct conditions, so the numbers run slightly lower than the old ratings. For Bay Area homes a heat pump around 15-18 SEER2 and 8-9 HSPF2 hits a good balance of efficiency and cost. With expensive PG&E electricity, spending a little more on a higher HSPF2 usually pays back over the unit's life.

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It depends on the price gap between electricity and gas, and in California that gap is unusually wide because PG&E electric rates are among the nation's highest. A heat pump is 3-4 times more efficient than a furnace, which offsets a lot of the rate difference, so operating costs often come out close to a gas furnace and can be lower with a heat-pump electric rate plan or solar. Just as important, going all-electric removes combustion and carbon monoxide risk from your home and future-proofs you against gas-appliance restrictions many Bay Area cities are adopting.

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A heat pump water heater pulls heat from the surrounding air to heat your water instead of using a gas flame or electric elements, making it roughly 3-4 times more efficient than a standard tank. It's usually worth it in the Bay Area, where it qualifies for federal tax credits and utility rebates and works great in a garage or utility space. The main trade-offs are that it needs adequate air volume around it and it slightly cools and dehumidifies the room it sits in — often a plus in a warm garage.

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Switching means replacing your gas furnace and (usually) your AC with a single heat pump system that both heats and cools, plus confirming your electrical panel and ductwork can support it. A technician will run a load calculation, check that your ducts are sized for the airflow, and verify you have panel capacity for the new electrical circuit. Many Bay Area homes need only minor electrical work, and you can then cap the gas line to that appliance. Cool Aid handles heat pump changeouts including the load calc, duct check, and electrical coordination.

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Yes — that's the main appeal of a heat pump. A single system provides air conditioning in summer and heating in winter by reversing its refrigerant cycle, so you retire both your old AC and your furnace at once. This frees up space, removes gas combustion from your home, and means one system to maintain instead of two. In the mild Bay Area climate a correctly sized heat pump handles both jobs year-round without any gas backup.

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A well-maintained heat pump typically lasts 12-15 years, and because it runs year-round for both heating and cooling it benefits from twice-a-year service rather than once. Key maintenance is changing filters regularly, keeping the outdoor coil clean, and having refrigerant charge and electrical connections checked each season. Coastal Bay Area homes should pay extra attention to the outdoor coil, since salt air accelerates corrosion. Cool Aid backs its heat pump work with a 1-year parts and labor warranty.

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Modern heat pumps are fairly quiet — a typical outdoor unit runs around 50-60 decibels, similar to a conversation or a refrigerator, and variable-speed models are quieter still because they ramp up and down instead of cycling hard on and off. Proper placement matters most: mounting the unit on a solid pad away from bedroom windows and neighboring walls keeps sound and vibration down. In dense Silicon Valley neighborhoods a good installer will factor setback and orientation into the placement.

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R-410A is being phased down under the federal AIM Act because it's a high global-warming-potential refrigerant, and as of January 1, 2025 manufacturers can no longer build new residential systems that use it. New equipment now ships with lower-impact A2L refrigerants like R-32 and R-454B instead. If you already own an R-410A system you can keep running and servicing it — R-410A remains available for existing equipment for years — but any brand-new system you buy will use one of the newer refrigerants. Cool Aid is trained on R-32 and R-454B and still services legacy R-410A units.

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R-32 and R-454B are the two low-global-warming refrigerants that replaced R-410A in new HVAC equipment starting in 2025. Both are classified A2L, meaning "mildly flammable" — they're much harder to ignite than propane and require a strong ignition source, and new systems are engineered with leak sensors and design standards to handle them safely. For a homeowner the practical takeaways are that the equipment is more climate-friendly and slightly more efficient, and that service must be done by a technician trained and certified for A2L refrigerants. Cool Aid's technicians are trained on both R-32 and R-454B.

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R-22 (Freon) has been banned from production and import in the U.S. since 2020, so no new supply is being made and the only R-22 available now is reclaimed, which has pushed prices very high. You can still technically recharge an R-22 system from reclaimed stock, but at today's prices a recharge on a leaking older unit rarely makes financial sense. If your R-22 system is leaking or aging, replacement with a modern R-32 or R-454B system is usually the smarter investment. Have a technician confirm whether it's worth one more repair or time to replace.

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No — a leak by itself doesn't automatically mean replacement. If the system is relatively young and the leak is in an accessible spot like a fitting or service valve, a technician can often repair it, pull a vacuum, and recharge for far less than a new unit. Replacement makes more sense when the leak is inside the coil, the system uses obsolete R-22, or the equipment is near the end of its life. A proper diagnosis with a leak-detection tool tells you which situation you're in before you spend money.

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R-290 is refrigerant-grade propane, a natural refrigerant with near-zero global warming potential and excellent efficiency, and it's now common in self-contained commercial units like reach-in coolers, freezers, and ice machines. Manufacturers adopted it because it cools efficiently while meeting tightening environmental rules, though because it's flammable it's limited to small charge sizes and requires technicians trained to handle it. Cool Aid is trained on R-290 and services R-290 commercial refrigeration across the Bay Area, and is factory-authorized for brands like True, Turbo Air, and Hoshizaki that use it.

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The refrigerant affects your system's long-term serviceability, efficiency, and environmental footprint, so it's worth knowing what a new unit uses. As of 2025 new residential systems use R-32 or R-454B, which are more future-proof than a discounted R-410A unit that uses a refrigerant already being phased down. Buying current-generation equipment means parts and refrigerant will stay readily available, and A2L systems are slightly more efficient. Make sure whoever installs and services it is certified for A2L refrigerants — Cool Aid is trained on R-32, R-454B, and R-290.

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EPA Section 608 is the federal rule governing the handling of refrigerants — it makes it illegal to knowingly vent refrigerant and requires anyone who services equipment with refrigerant to be certified to recover it properly. A technician with 608 Universal certification is qualified to handle all refrigerant types, from legacy R-22 to the newer A2Ls, and to recover rather than release them during service. Hiring an uncertified person to touch your refrigerant lines isn't just risky, it's a violation of federal law. Cool Aid holds EPA Universal (Section 608) certification.

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No — a system that needs refrigerant added is a system that's leaking, because refrigerant is sealed in a closed loop and isn't consumed like fuel. Annual "top-offs" only mask the leak while venting refrigerant into the atmosphere, which is both wasteful and a violation of EPA Section 608. The correct fix is to find and repair the leak, then recharge to the manufacturer's exact specification. If a contractor offers to just keep refilling it without finding the leak, get a second opinion.

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In the short term, yes, slightly — A2L systems require technicians with additional certification and updated tools, and as a newer technology some parts carry a premium while supply chains mature. Over the life of the system, though, they should be comparable to older refrigerants, and you avoid the steep price climb that hits obsolete refrigerants like R-22. The bigger cost risk is buying a clearance R-410A system now and facing rising refrigerant prices as that refrigerant is phased down. A technician certified on the newer refrigerants can service them without markup for special handling.

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Both are excellent, low-global-warming replacements for R-410A, and the better choice usually comes down to which brand you're buying rather than the refrigerant itself. R-32 is a single-component refrigerant that's very efficient and easy to recharge, while R-454B has an even lower global warming potential and behaves closely to the old R-410A, which some manufacturers preferred for system design. Both are A2L and require a certified technician to service. Cool Aid is trained on both and is factory-authorized for brands like Daikin, Trane, Carrier, and York that use them.

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It must be recovered, not released — federal EPA Section 608 rules require a certified technician to pump the refrigerant out of your old system into a recovery cylinder so it can be reclaimed or properly disposed of, never vented to the atmosphere. This is standard practice on any legitimate changeout, whether the old unit used R-22 or R-410A. Recovered refrigerant like R-22 is often reclaimed and reused to service other existing systems. Cool Aid holds EPA Universal certification and recovers refrigerant properly on every replacement.

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The most common reasons a commercial ice machine stops producing are a shut-off water supply or clogged inlet valve, a tripped high-pressure or safety switch from a dirty condenser coil, or a failed water pump or control board. Start by confirming the water line is on and the unit isn't in a cleaning or off cycle, then check that the condenser (the coils on an air-cooled unit) isn't packed with dust, which forces the machine to shut down on high head pressure. If the coil is clean and water is flowing but you still get no ice, it usually points to a refrigerant, electrical, or control fault that needs a technician. Cool Aid is factory-authorized for Manitowoc, Hoshizaki, and Scotsman and handles emergency ice-machine calls 24/7 across the Bay Area.

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Cloudy or white ice is almost always caused by high dissolved minerals in the water plus scale buildup inside the machine, not a broken part. Bay Area tap water is moderately hard, so calcium and magnesium concentrate in the freezing process and get trapped as white, hazy cubes; heavy mineral loading can also slow the harvest and make cubes soft. The fix is a proper descaling with a nickel-safe ice-machine cleaner and, longer term, a scale-reducing water filter on the inlet. If the cubes are cloudy only in the center it's often normal, but full-cube cloudiness means it's time to clean and check your filtration.

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Off-tasting or smelly ice is usually from slime, mold, or biofilm growing inside the machine, or from the ice absorbing odors in a walk-in or freezer. Ice is porous and picks up smells from nearby food, so an uncovered bin next to onions, seafood, or cleaning chemicals will taint every cube. Deep-clean and sanitize the machine, bin, and scoop, replace an old water filter, and keep strong-smelling items away from the storage bin. If the bad taste comes back within days of cleaning, you likely have a biofilm problem in the water lines that needs a full teardown sanitation.

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Most manufacturers, including Manitowoc, Hoshizaki, and Scotsman, recommend a full cleaning and sanitizing at least every six months, and every three to four months is smarter in hard-water areas like the Bay Area. High-volume restaurants, bars, and anywhere with poor filtration should inspect monthly because scale builds fast. Skipping cleanings is the number-one cause of slow production, cloudy ice, and premature compressor failure. Many operators put ice-machine cleaning on the same schedule as their refrigeration maintenance so it doesn't get forgotten.

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Use a nickel-safe ice-machine descaler (not vinegar or generic acid, which can damage plating and food-contact surfaces) and run it through the machine's cleaning cycle, then follow with a separate sanitizer per the manufacturer's directions. You'll need to remove and hand-clean the water distribution parts, curtain, and bin where the hard chalky deposits collect. Never mix the descaler and sanitizer, and rinse thoroughly so no chemical ends up in the ice. If scale keeps returning quickly, the real fix is a scale-inhibiting water filter, which Cool Aid can size and install so you're not descaling every few weeks.

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Yes, a dedicated water filter is strongly recommended for any commercial ice machine, especially on Bay Area water. A scale-reducing and sediment filter protects the water valve, pump, and evaporator from mineral buildup, produces clearer and better-tasting ice, and can meaningfully extend the machine's life. Filters are inexpensive and typically get changed every six months, far cheaper than the repairs caused by scale. Match the filter to your machine's daily ice output so you don't starve it of water flow.

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A gradual drop in ice output is usually a dirty condenser coil, scale-clogged water distribution, or warm ambient conditions, and sometimes a low refrigerant charge. As the coil and water passages foul, the machine runs longer and harvests less per cycle, which is why production quietly falls off over months. Clean the condenser, descale the water side, and make sure the machine has adequate airflow and isn't sitting in a hot back-of-house corner above about 90 degrees. If it's clean and cool but still underproducing, have a tech check the refrigerant charge and harvest cycle timing.

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Slow harvests and ice hanging up on the evaporator are typically caused by scale on the evaporator plate, a weak or failing harvest (hot gas) valve, or low water flow across the plate. Mineral buildup insulates the plate so cubes freeze unevenly and won't release cleanly, stretching each cycle and cutting daily output. A thorough descaling fixes many of these cases; if it persists, the hot-gas harvest valve, water pump, or thermostat/probe may be failing. Because these repairs involve the sealed refrigeration system, an EPA-certified refrigeration tech should diagnose it.

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As a rough rule, plan on about 1 to 1.5 pounds of ice per customer per day for a restaurant, and closer to 2 to 3 pounds per seat for a bar or high-volume drink program. So a 150-cover restaurant lands around 200 to 300 pounds a day, meaning you'd spec a machine rated well above that since real-world output drops in hot kitchens. Always oversize modestly for summer peaks and account for a warm back-of-house, and match the bin capacity to your busiest rush, not your average. Cool Aid installs and services Manitowoc, Hoshizaki, and Scotsman units and can right-size a machine and bin for your actual volume.

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Ice-machine leaks usually trace to a clogged or misaligned drain, a cracked or worn water trough or inlet tubing, a failing water valve that won't fully close, or a dirty machine causing overflow during the fill cycle. Start by clearing the drain line and confirming the machine is level, since an out-of-level unit sends water past the trough. Scale and slime buildup can also block the distribution system and push water outside the cabinet. If the drain and level check out and it's still leaking, the water valve or trough likely needs replacing.

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A well-maintained commercial ice machine typically lasts about 8 to 12 years, but that hinges almost entirely on water quality and cleaning discipline. Machines fed by hard, unfiltered Bay Area water and cleaned rarely can fail in half that time from scale-related compressor and component wear. If your unit needs frequent repairs, has a failed compressor, or can no longer keep up with your volume, replacement usually pencils out over pouring money into an aging machine. When Cool Aid replaces a compressor on any refrigeration unit, they always clean the condenser coil too, since a fouled coil is what usually killed the original.

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A pilot light that won't stay lit is most often a dirty or failing thermocouple, which senses the flame and shuts off the gas when it doesn't register enough heat. Drafts, a clogged pilot orifice, or a weak gas supply can also snuff it out. Cleaning the thermocouple and pilot tube sometimes helps, but a worn thermocouple is an inexpensive part that usually just needs replacing. If you smell gas or the pilot won't relight at all, shut off the gas and call a licensed tech rather than repeatedly trying to light it.

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Most furnaces built in the last couple of decades use a hot-surface ignitor or spark ignitor instead of a standing pilot, and a failed ignitor is one of the most common no-heat calls. Hot-surface ignitors are fragile and burn out over time; if you watch the startup and the ignitor never glows orange, it likely needs replacing. It can also be a bad flame sensor, a tripped safety, or a control-board fault that never sends the ignition signal. Ignitor replacement is a straightforward, affordable repair, but the diagnosis should confirm it isn't a safety switch protecting you from a bigger problem.

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If the furnace starts its sequence but the burners don't fire or drop out after a few seconds, the usual culprits are a dirty flame sensor, a failing ignitor, or a safety switch tripping on a blocked flue or overheating. A grimy flame sensor is extremely common: it can't confirm the flame, so the control board shuts the gas off as a safety measure and you get a short burst of heat then cold air. Cleaning the flame sensor often restores normal operation. Because this circuit exists to prevent unburned gas and carbon monoxide problems, don't bypass any switch, have it properly diagnosed.

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Yes, and in California carbon monoxide alarms are legally required in homes with gas appliances or an attached garage. A gas furnace can produce carbon monoxide if the heat exchanger cracks or the flue is blocked, and CO is colorless and odorless, so a detector is your only reliable warning. Put alarms outside sleeping areas and on each level, and test them each fall before heating season. If a CO alarm sounds, get everyone outside, call 911 or the fire department, and don't run the furnace until a technician inspects it.

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Common signs include a carbon monoxide alarm going off, soot or corrosion around the burners, a flickering or yellow burner flame instead of steady blue, a strong chemical or formaldehyde-like smell when the heat runs, and unexplained headaches or nausea that ease when you leave the house. You often can't see a hairline crack directly, which is why technicians use cameras and combustion tests to find them. A cracked heat exchanger can leak carbon monoxide into your air, so if any of these appear, shut the furnace off and have it inspected immediately. It's one of the few furnace failures that typically means replacement rather than repair.

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Uneven heating usually comes from ductwork issues, closed or blocked vents, poor insulation, or an undersized or unbalanced system, not a broken furnace. Long duct runs to far rooms lose heat, and leaky or crushed ducts in an attic or crawlspace, common in older Bay Area homes, deliver far less warm air to those spaces. Start by confirming vents are open and unobstructed and the filter is clean, then look at duct sealing and insulation. If the imbalance is severe, adding a return, sealing ducts, or zoning the system can even things out.

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A rotten-egg or sulfur smell means a possible natural gas leak and should be treated as an emergency. Utilities add that odor to gas specifically so you can detect leaks, so if the smell is strong, leave the house, don't flip switches, and call PG&E or 911 from outside. A faint gas whiff only at startup that clears quickly can be normal, but a persistent or strong odor is not. Once it's safe, have a licensed technician pressure-test the gas line and inspect the furnace before running it again.

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A dusty or slightly burning smell the first time you run the heat each fall is usually normal and comes from dust burning off the heat exchanger and burners after months of sitting idle. It should fade within an hour or two; changing the air filter and running the system for a bit usually clears it. A musty or mildew smell, on the other hand, points to moisture or mold in the ductwork or around the coil and is worth having checked. If any burning smell is strong, smells electrical, or doesn't go away, shut the furnace off and have it inspected.

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Short cycling (turning on and off every few minutes) in heating mode points to the furnace or its controls, most often an overheating unit tripping the high-limit switch from a dirty filter or blocked airflow, a bad flame sensor, or an oversized furnace. Because your furnace and central AC share the same blower, ductwork, and thermostat, the same restricted airflow can cause cooling problems in summer too, but the ignition, burner, and limit components involved in winter short cycling are furnace-specific. Start with a fresh filter and make sure vents and returns are open. If it keeps cycling, have the flame sensor, limit switch, and thermostat checked before assuming the AC side is involved.

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When the thermostat calls for heat but nothing happens, check the simple stuff first: dead thermostat batteries, a tripped furnace breaker, the furnace door safety switch not fully seated, or the furnace switch accidentally turned off. A clogged condensate drain or tripped safety on high-efficiency furnaces can also lock out ignition. If the thermostat screen is blank or unresponsive, it may just need batteries or have a loose wire. If power and the thermostat are fine but the furnace still won't fire, the control board, ignitor, or a safety switch is likely involved and needs a technician.

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A 20-year-old furnace isn't automatically unsafe, but it's near the end of its typical 15-to-20-year life, so it deserves a thorough heat-exchanger and combustion inspection each season. The real concerns with aging gas furnaces are heat-exchanger cracks and carbon monoxide, plus falling efficiency that quietly raises your PG&E bill. If it's needing repairs, heating unevenly, or showing any combustion problems, replacing it with a modern high-efficiency unit or a heat pump usually makes more sense than continued fixes. An annual inspection is the best way to confirm an older furnace is still safe to run.

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Yes, most Bay Area HVAC companies charge a diagnostic or service-call fee, typically $89–$150, to send a licensed technician out and pinpoint what's wrong. Many will waive or credit that fee toward the repair if you approve the work. Think of it as paying for an accurate diagnosis rather than a guess — a proper diagnosis often includes testing electrical components, refrigerant pressures, and airflow, not just a quick look.

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The $5,000 rule says to multiply the age of your system by the estimated repair cost — if the result is over $5,000, replace it; if it's under, repair it. For example, a 10-year-old AC facing a $600 repair scores 6,000, which leans toward replacement, while a 4-year-old unit with the same repair scores 2,400 and is worth fixing. It's a quick rule of thumb, not gospel — a licensed tech should also weigh the refrigerant type (older R-22 and R-410A systems cost more to service) and the overall condition of the unit.

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Yes, most established Bay Area HVAC contractors offer financing on new installs, often through third-party lenders with terms ranging from 12-month same-as-cash plans up to 5–10 year loans. Because a full residential HVAC replacement in the Bay Area commonly runs $12,000–$25,000 or more, spreading the cost is popular. Federal tax credits plus PG&E and TECH heat-pump rebates can also lower the effective price, so ask which equipment qualifies before you sign anything.

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HVAC replacement quotes vary house to house because the equipment is only part of the price — permits, Title 24 compliance, ductwork condition, electrical panel upgrades, and difficult attic or rooftop access all move the number. A heat-pump conversion, for instance, may require a new circuit or panel work that your neighbor's like-for-like swap didn't. Two homes on the same street can legitimately differ by thousands depending on what's behind the walls.

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Commercial refrigeration repairs in the Bay Area typically run $350–$1,500 for common issues like a failed fan motor, thermostat, defrost control board, or refrigerant leak, while a compressor replacement can reach $2,000–$4,500 or more. The final cost depends on the unit, the refrigerant, and whether it's an after-hours emergency. Cool Aid holds a California C-38 refrigeration license, is EPA Universal (Section 608) certified, and is factory-authorized for brands like True, Traulsen, and Turbo Air.

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Replacing the compressor in a commercial refrigerator or walk-in cooler typically costs $1,800–$4,500 or more installed, depending on horsepower, refrigerant, and whether it's a self-contained or remote system. One detail separates a lasting repair from a repeat failure: a good tech always cleans the condenser coil during the swap, because a dirty coil is usually what overheated and killed the original compressor. Cool Aid makes condenser-coil cleaning standard on every compressor replacement.

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Yes, expect a premium for after-hours, weekend, or holiday HVAC and refrigeration service — often around 1.5x the normal labor rate or a higher flat emergency dispatch fee. For a restaurant with a failing walk-in cooler or a business losing inventory to a warm reach-in, that premium is usually far cheaper than the spoiled product. Cool Aid offers 24/7 emergency HVAC and refrigeration service across the Bay Area.

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HVAC quotes vary because companies differ in equipment brand and tier, labor rates, warranty coverage, permit handling, and how carefully they size the system. A lowball quote may skip a proper load calculation, pulled permits, or Title 24 documentation, while a higher one may include better equipment, a longer warranty, and code compliance built in. Compare what's actually included line by line rather than just the bottom number.

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Often, yes — a quote far below every other bid can signal an unlicensed contractor, no permits, skipped Title 24 compliance, undersized equipment, or a bait-and-switch once the job starts. In California, always confirm the contractor holds an active license (C-20 for HVAC, C-38 for refrigeration) and carries insurance before hiring. Cool Aid is fully licensed and backs its work with a 1-year parts-and-labor warranty; a price that seems too good to be true usually leaves something important out.

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Replacing an AC compressor in a Bay Area home typically costs $1,500–$3,200, and more for larger or high-efficiency systems. Because the compressor is the single most expensive part, its failure is a common tipping point: if the unit is out of warranty and over 10 years old, putting that money toward a new system is often the smarter spend. A quality tech will also clean the condenser coil during the job, since a dirty coil is frequently what caused the compressor to overheat and fail in the first place.

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Commercial ice machine repairs typically run $300–$1,200 in the Bay Area, depending on whether it's a water inlet valve, sensor, or pump versus a sealed refrigeration-system problem. Hard Bay Area water is a frequent culprit, building scale that cuts ice output and triggers breakdowns, so regular descaling and cleaning prevent a lot of service calls. Cool Aid is factory-authorized for Manitowoc, Hoshizaki, and Scotsman ice machines.

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Get your air conditioner tuned up once a year, ideally in spring before the first Bay Area heat wave. A professional tune-up includes cleaning the condenser coil, checking refrigerant charge and pressures, testing the capacitor and electrical connections, clearing the condensate drain, and verifying airflow and the temperature split across the coil. Annual tune-ups catch small problems early, keep efficiency up, and are often required to keep the manufacturer's warranty valid.

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For most Bay Area homes, a MERV 8–11 filter is the sweet spot — it captures dust, pollen, and fine particulates without choking airflow. Going to MERV 13 filters wildfire smoke and smaller particles but can strain older blowers and raise energy use unless the system was designed for it. During wildfire season a MERV 13 is worth it if your equipment can handle the added resistance; otherwise match the filter to what your system can comfortably pull air through.

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SEER2 is the updated efficiency rating that replaced SEER in 2023, measuring cooling output per watt under tougher, more realistic testing conditions with higher static pressure. A SEER2 number runs about 4–5% lower than the old SEER for the same unit, so a 15 SEER is roughly 14.3 SEER2 — the equipment isn't less efficient, it's just measured more strictly. In California, new AC and heat-pump installs must meet minimum SEER2 standards, so it's the number to compare when shopping.

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Under PG&E time-of-use plans, running your AC is cheapest before about 4 p.m. and after 9 p.m., since peak pricing hits hardest from 4–9 p.m. on weekdays. Pre-cooling your home in the early afternoon and letting the thermostat drift up a few degrees during those peak hours can noticeably trim your bill. A smart thermostat can automate this around PG&E's schedule so you don't have to think about it.

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Set it higher rather than shutting it off completely. Letting your home rise to about 78–82°F while you're away, instead of turning the AC fully off, saves energy without forcing the system to work overtime cooling a heat-soaked house back down when you return. A smart or programmable thermostat that eases the temperature back before you get home gives you both the savings and the comfort.

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Yes — leaky ducts can waste 20–30% of your heated or cooled air into attics and crawlspaces, so sealing them is one of the highest-value efficiency upgrades available. In older Bay Area homes with original ductwork, sealing and insulating ducts often improves comfort in far rooms and lowers PG&E bills more than a new thermostat would. It also helps your ducts meet Title 24 requirements when you replace equipment.

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Signs your AC is overdue include weak or uneven airflow, longer run times, creeping energy bills, musty or dusty air, unusual noises, and simply not remembering your last service. Ice on the refrigerant line or water pooling near the indoor unit are red flags to act on sooner rather than later. As a rule, if it's been more than a year since a professional tune-up, you're due.

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You can safely handle the basics yourself: replacing or cleaning filters every 1–3 months, keeping the outdoor condenser clear of leaves and debris with about two feet of clearance, gently rinsing the outdoor coil, and keeping supply vents unblocked. Leave refrigerant handling, electrical and capacitor work, and deep coil cleaning to a licensed technician — those require EPA certification and specialized tools, and mistakes can be dangerous. A yearly professional tune-up plus your own filter habit is the ideal combination.

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To extend HVAC life, change filters regularly, get an annual professional tune-up, keep the outdoor unit clean and clear, seal duct leaks, and fix small problems before they cascade into big ones. Most Bay Area systems last 12–18 years, and the ones that reach the high end are almost always the ones that were maintained. Near the Bay, rinsing salt and corrosion off the condenser coil matters even more, since coastal air shortens the life of neglected units.

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Have your AC condenser coil professionally cleaned at least once a year, and rinse visible debris off more often if it sits under trees or near the Bay. A dirty coil can't shed heat, which forces the compressor to run hot — it's the single most common cause of premature compressor failure, which is why good techs clean the coil during any major repair. Near the coast, salt-air corrosion makes regular coil care even more important.

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A clogged filter can raise your cooling and heating costs by roughly 5–15%, because the blower has to work harder to pull air through the restriction. It also strains the whole system and can lead to frozen coils or an overheated blower motor. Checking your filter monthly and replacing it every 1–3 months is one of the cheapest ways to protect both your efficiency and your equipment.

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Yes. BayREN Home+ is a regional program from the Bay Area's nine counties that pays cash rebates directly to homeowners for energy upgrades, including heat pump HVAC and heat pump water heaters. Rebate amounts vary by measure and are typically several hundred to a couple thousand dollars, and you can often stack them with utility and federal incentives. You must use a participating contractor and pull the required permit, so confirm eligibility before the work starts.

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TECH Clean California is a statewide initiative that funnels incentives through participating contractors to lower the upfront cost of heat pump space heating and heat pump water heaters. Instead of a mail-in rebate, the discount is usually applied by the installer at the point of sale, so you see it come off your quote. Amounts depend on your equipment and whether you qualify for enhanced income-based incentives, and it can generally be combined with BayREN and the federal 25C tax credit.

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The federal 25C Energy Efficient Home Improvement Credit covers 30% of the cost of a qualifying heat pump, capped at $2,000 per year, as long as the equipment meets the required efficiency tier. It's a nonrefundable credit you claim on your tax return, not an instant rebate, so it reduces what you owe rather than putting cash in hand. Keep your invoice and the manufacturer's certification, and confirm the model's efficiency ratings qualify before you buy.

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Yes, in most cases you can layer BayREN Home+, TECH Clean California, any PG&E incentive, and the federal 25C tax credit on the same heat pump install, which can knock several thousand dollars off the net cost. The rebates reduce your upfront price and the 25C credit reduces your taxes later. The main rules are that you use a participating licensed contractor, meet the efficiency tiers, and pull a permit — so plan the paperwork before the job, not after.

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For much of the immediate coast and bayside cities like San Francisco, Daly City, and parts of Fremont, you can often get by without AC because ocean breezes keep summers mild. But inland Silicon Valley — San Jose, Morgan Hill, Gilroy, Livermore, and Pleasanton — regularly sees stretches of 90 to 100+ degree heat where AC matters for comfort and health. A heat pump is a popular choice here because one system handles both the cooling you need on hot inland days and efficient heating in winter.

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For most Bay Area homes, an electric heat pump is the best fit because the region's mild winters and moderate summers play to its strengths — it heats and cools efficiently without extreme temperature swings to fight. Coastal homes may only need light cooling, while inland Silicon Valley benefits from a properly sized heat pump or high-efficiency AC paired with a furnace. Cool Aid installs Daikin, Trane, Carrier, Amana, Goodman, and York systems and can size the right setup for your specific microclimate.

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Title 24 is California's Building Energy Efficiency Standards, and it applies whenever you replace HVAC equipment, not just in new construction. In practice it can require things like duct sealing and testing, a properly sized system, a compliant thermostat, and refrigerant charge verification when you swap out a furnace or AC. These measures are tied to your permit, which is why a licensed contractor pulls the permit and documents compliance — skipping it can create problems when you sell the home.

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Yes. Replacing a furnace, AC, or heat pump is a permitted job throughout Santa Clara County cities like San Jose, Santa Clara, Sunnyvale, and Cupertino, because the work involves gas, electrical, and Title 24 compliance. A licensed contractor normally pulls the permit and schedules the inspection as part of the install, and the permit protects you by verifying the equipment was sized and installed to code. An unpermitted swap can surface as a red flag during a home sale or insurance claim.

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Your licensed contractor should pull the HVAC permit, and that's the safer arrangement for you. When the contractor pulls it, they take responsibility for meeting code and passing inspection; if a homeowner pulls their own permit, the liability shifts to them. Cool Aid holds California C-20 HVAC and C-38 refrigeration licenses and handles permitting and Title 24 documentation as part of a proper install in Bay Area cities.

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Yes. Homes close to San Francisco Bay or the coast — think Redwood City shoreline, Newark, and Fremont's bayfront — get salt-laden air that corrodes the aluminum fins, copper lines, and cabinet of an outdoor condenser faster than in inland areas. Corrosion restricts airflow and eats at the coil, which can cut years off the unit's life and lead to refrigerant leaks. Rinsing the coil with fresh water periodically and choosing coastal-rated or coated coils helps a lot in these zones.

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Rinse the outdoor coil gently with fresh water every few weeks in salt-exposed areas, keep the unit clear of vegetation, and choose equipment with corrosion-resistant or coated coils when you replace it. Regular professional maintenance catches early corrosion and cleans the coil before it chokes airflow. Cool Aid always cleans the condenser coil when replacing a compressor, because a dirty, corroded coil is usually what killed the old compressor in the first place.

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During Bay Area wildfire smoke events, run your HVAC fan continuously with a high-efficiency filter — ideally MERV 13 if your system can handle it — to capture fine particulates, and keep windows and outside-air dampers closed. Change the filter more often than usual during heavy smoke because it loads up fast. If your ducts pull in outside air, have a technician confirm it can be closed off, and consider a portable HEPA cleaner in the room where you spend the most time.

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It can if your system wasn't designed for the extra resistance, so it's worth checking before you upgrade. MERV 13 filters catch wildfire smoke and fine particles far better than basic filters, but the denser media restricts airflow, which can strain the blower and reduce efficiency on some older systems. A technician can confirm your equipment handles MERV 13, or recommend a deeper media cabinet that gives you high filtration without choking the airflow.

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For many Bay Area homes it makes sense, especially with current rebates. A heat pump replaces both your gas furnace and AC with one efficient electric system, eliminates combustion and carbon monoxide risk indoors, and pairs well with the region's mild climate and any rooftop solar. The tradeoffs are PG&E electricity rates and the upfront cost, though BayREN, TECH Clean California, and the 25C tax credit offset much of that. It's worth having a contractor evaluate your panel capacity and ductwork first.

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Sometimes, but not always. A heat pump adds electrical load, and older Bay Area homes with 100-amp or smaller panels may need an upgrade or a load-management device to add one safely alongside other electric appliances. Newer 200-amp panels often have room already. A contractor should evaluate your panel and circuits during the estimate, since panel work affects both the cost and the permit for an electrification project.

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Higher costs in San Jose, Santa Clara, and the rest of Silicon Valley come from the region's elevated labor rates, permit and inspection fees, and stricter Title 24 compliance work like duct testing that gets rolled into the job. Coastal corrosion and older housing stock can also add prep work. The upside is that local rebates through BayREN, TECH Clean California, and PG&E, plus the federal tax credit, are specifically available here to bring the net cost down.

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Yes. Cities like Fremont and Palo Alto fall under BayREN Home+ and TECH Clean California, and Palo Alto residents are served by the city's own municipal utility, which has run its own electrification and heat pump incentives separate from PG&E. Fremont homeowners on PG&E can also tap PG&E programs plus the federal 25C credit. Because Palo Alto's utility is city-owned, always check its current programs directly, since they differ from PG&E territory.

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Yes. California code requires water heaters to be braced or strapped against earthquakes, typically with two straps — one in the upper third and one in the lower third of the tank — anchored to wall studs. In the seismically active Bay Area this keeps the tank from toppling, which prevents gas-line ruptures, water damage, and fire risk after a quake. It's also commonly checked and required at the point of sale, so it's worth verifying yours is properly secured.

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Yes, it's good practice in the Bay Area's earthquake country. Rooftop and outdoor condensing units should be anchored to their pads or curbs, and suspended or attic furnaces should be strapped or braced so they can't shift, break a gas line, or damage refrigerant connections during a quake. Gas-fired equipment especially benefits from a flexible gas connector and secure mounting. A technician can check that your unit is properly anchored during a maintenance visit.

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PG&E offers rebates and incentives for qualifying heat pumps, heat pump water heaters, and efficient HVAC upgrades, and it partners with the statewide TECH Clean California and regional BayREN programs that serve its Bay Area territory. Because specific PG&E rebate amounts and eligibility change from year to year, check PG&E's current listings or ask your contractor which incentives apply to the exact equipment you're installing. These usually combine with the federal 25C tax credit for additional savings.

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A true HVAC emergency is anything that threatens health, safety, food, or property: a gas smell, a suspected carbon monoxide leak, no cooling during a heat wave for infants or elderly residents, no heat in a cold snap, water actively leaking into your home, or a commercial cooler losing temperature with product inside. Minor issues like a slightly noisy fan, a weak airflow in one room, or a thermostat that needs recalibrating can safely wait for a regular appointment. When you're unsure, call and describe the symptoms — a dispatcher can triage whether it needs a same-day tech. Cool Aid runs 24/7 emergency HVAC and refrigeration service across the Bay Area for exactly these situations.

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First get the household cool and safe: close blinds on sun-facing windows, run fans, hydrate, and move anyone vulnerable (infants, elderly, people with heart or breathing conditions) to the coolest room or a public cooling center if indoor temps climb past the mid-80s. Then check the easy stuff — a tripped breaker, a thermostat set wrong, or a clogged filter choking airflow — before calling for service. If those aren't it, call a 24/7 emergency HVAC company, since heat-wave demand books techs fast. Cool Aid handles after-hours AC failures throughout San Jose, Santa Clara, and the wider Bay Area.

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Keep the walk-in door shut — an unopened, well-insulated cooler holds safe temperature for a few hours, and every time you open it you lose cold air. Move the most perishable and highest-value product (dairy, raw proteins, prepped items) into reach-in units, a working freezer, or coolers packed with ice, and log the time the unit failed. Food held above 40°F for more than four hours generally must be discarded under California health code, so document temperatures to support any insurance claim. Then call a 24/7 commercial refrigeration service immediately — Cool Aid offers round-the-clock emergency refrigeration repair to limit exactly this kind of loss.

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Yes — treat any gas smell as an immediate emergency. Don't flip light switches, use your phone indoors, or light anything, since a spark can ignite the gas. Get everyone outside, and if it's safe and you can reach it quickly, turn off the gas at the meter, then call your gas utility (PG&E at 1-800-743-5000) and 911 from outside. Only after the utility confirms it's safe should you bring in an HVAC contractor to find and repair the source; Cool Aid can diagnose furnace and gas-appliance faults once the area is cleared.

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Carbon monoxide is colorless and odorless, so the reliable warning is a CO detector alarm — every home with gas appliances should have one near sleeping areas. Physical clues include soot or yellow-brown staining around the furnace, a burner flame that's yellow instead of crisp blue, excess condensation on windows, and household members with unexplained headaches, dizziness, or nausea that improve when they leave the house. If your detector sounds or you suspect CO, get everyone outside into fresh air, call 911, and don't re-enter until it's cleared. A cracked heat exchanger is a common cause, so have a licensed HVAC tech inspect the furnace before running it again.

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Yes, turn the system off at the thermostat to stop more water from accumulating and to protect the equipment and your floors or ceiling. The usual culprits are a clogged condensate drain line, a full or cracked drain pan, a failed condensate pump, or a frozen evaporator coil that's now melting. You can clear a visibly blocked drain or empty the pan yourself, but persistent leaks or ice on the coil need a technician, since they often point to low refrigerant or airflow problems. Leaving it running risks water damage and mold, so it's worth a prompt service call.

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Make the space safe and give the tech a head start. For heat or cooling failures, adjust the environment — fans, blinds, extra layers — and keep vulnerable people comfortable. Shut the system off at the thermostat or breaker if you see water, ice, burning smells, or hear grinding, since running a failing unit can turn a repair into a replacement. Clear access to the indoor and outdoor units, note when the problem started and any sounds or smells, and have your equipment model number handy so the technician can arrive prepared with likely parts.

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Genuine 24/7 emergency HVAC companies do — they staff after-hours dispatch and keep on-call technicians for nights, weekends, and holidays, because refrigeration and heating failures don't wait for business hours. Beware of firms that advertise 24/7 but only route you to a voicemail until morning; ask directly whether a live person answers and whether a tech is actually dispatched overnight. Cool Aid provides around-the-clock emergency HVAC and refrigeration response across the Bay Area, which matters most for restaurants and businesses facing overnight equipment failures.

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A brief dusty smell when heat first kicks on in the fall is normal, but a sharp electrical, plastic, or burning-wire odor is not — shut the system off at the breaker right away. It can signal an overheating motor, failing capacitor, or scorched wiring, all of which are fire risks if the unit keeps running. A faint musty or moldy smell is less urgent but still worth addressing, since it usually means microbial growth in the coil or ducts. If the smell is electrical or you see smoke, call for emergency service rather than restarting the equipment.

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For a business losing product, response time is the whole game, and dedicated commercial refrigeration companies aim to dispatch a technician within a couple of hours on emergency calls — sometimes faster depending on location and time of night. To speed things up, have your unit's make, model, and a description of the symptoms ready, and start protecting inventory the moment you notice the problem. Cool Aid runs 24/7 emergency refrigeration service across Silicon Valley and the Bay Area and is factory-authorized for brands like True, Traulsen, Turbo Air, Manitowoc Ice, Hoshizaki, and Scotsman, so techs often arrive with the right parts.

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In California the C-20 license covers warm-air heating, ventilating, and air conditioning, while the C-38 license covers refrigeration — they're separate classifications issued by the Contractors State License Board (CSLB). A contractor with only a C-20 can legally install and repair your home's AC and furnace but isn't licensed for commercial refrigeration like walk-in coolers or ice machines, and vice versa. Holding both means the company can legally and competently handle everything from a rooftop HVAC unit to a restaurant's refrigeration line. Cool Aid carries both the C-20 and C-38 licenses, which is why it serves residential HVAC and commercial refrigeration under one roof.

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EPA Section 608 certification is a federal requirement for any technician who handles refrigerants, because those chemicals are regulated for environmental and safety reasons. The top tier, EPA Universal certification, qualifies a tech to work on all equipment types — small appliances, high-pressure, and low-pressure systems. Hiring an uncertified person to charge or recover refrigerant is illegal and often means the work is done wrong, leading to leaks or damaged equipment. Cool Aid's technicians hold EPA Universal (Section 608) certification, which matters more than ever as the industry shifts to newer refrigerants like R-32 and R-454B.

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Ask for their CSLB license number and verify it's active, confirm they carry liability insurance and workers' compensation, and ask whether their technicians are EPA-certified to handle refrigerant. Get the warranty terms in writing — both the manufacturer's parts coverage and the contractor's labor guarantee — and ask for a written, itemized estimate rather than a verbal ballpark. It's also fair to ask how long they've been in business locally and whether they're factory-authorized for the equipment brands you own. Straightforward answers are a good sign; evasiveness or pressure to decide on the spot is not.

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Watch for high-pressure sales pushing an immediate full-system replacement without diagnosing the actual problem, quotes given over the phone sight-unseen, and demands for large cash payment up front. Other warning signs are no written estimate, no verifiable license number, vague or missing warranty terms, and refusal to itemize parts and labor. Scare tactics — like claiming a cracked heat exchanger without showing you evidence — are a classic upsell move. A reputable contractor explains the diagnosis, shows you the failed part when possible, and gives you options rather than an ultimatum.

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California law requires any contractor doing HVAC work over $500 to be licensed by the CSLB, and hiring an unlicensed operator leaves you exposed — you may have no recourse for shoddy work, no valid manufacturer warranty, and personal liability if an uninsured worker is hurt on your property. Licensed contractors carry liability insurance and workers' compensation, which protects your home and finances if something goes wrong. Licensing also means the company passed exams, met experience requirements, and can be held accountable through the state board. Cool Aid is fully licensed (C-20 and C-38) and has operated in the Bay Area since 1966.

📌 Learn more: repair costs | Bay Area service | licensing & credentials

It's very important — the manufacturer's warranty typically covers only the parts, leaving you to pay labor if a repair fails or an installed component quits early. A contractor-backed labor warranty means the company will come back and fix qualifying issues at no additional labor cost, which also signals they stand behind their workmanship. Faulty installation is one of the most common reasons systems underperform, so labor coverage protects you from paying twice for the same problem. Cool Aid backs its work with a 1-year parts-and-labor warranty.

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Both can do good work, but family-owned local companies often bring advantages that matter for HVAC: consistent technicians who know the area's climate and equipment, direct accountability to the owner, and less pressure from corporate sales quotas that push unnecessary replacements. National chains may have broader scheduling but sometimes rely on subcontractors and commissioned salespeople. What matters most is the same either way — proper licensing, EPA certification, insurance, and a solid warranty. Cool Aid has been family-owned since 1966 and is now run by second-generation owner Jim McKinny, whose father founded the company.

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Yes, especially when you're facing a major expense — a full system replacement is one of the largest home repairs, and a second opinion is worth the time and any small diagnostic fee. Contractors can reach different conclusions, and what one calls a dead system another may fix with a repair. Get written estimates from at least two licensed companies, make sure they're pricing comparable equipment and scope, and be wary if only the highest-pressure quote insists on immediate replacement. A trustworthy contractor won't be offended that you're doing your homework.

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Go to the Contractors State License Board website (cslb.ca.gov) and use the "Check a License" tool — enter the contractor's license number or business name to confirm the license is active, see which classifications they hold (like C-20 for HVAC or C-38 for refrigeration), and check that their bond and workers' comp are current. The lookup also shows any disciplinary history or complaints. Do this before signing anything or paying a deposit; a legitimate contractor will readily give you their license number. It takes two minutes and protects you from unlicensed operators.

📌 Learn more: commercial refrigeration | licensing & credentials

Factory-authorized contractors have been trained and approved by specific equipment manufacturers, which means they know those systems' specifications, use genuine parts, and can install and service them without voiding the manufacturer's warranty. Using an unauthorized installer or aftermarket parts can invalidate coverage on expensive equipment. It also means the tech is up to date on that brand's newer models and refrigerants. Cool Aid is factory-authorized for brands including Daikin, Trane, Carrier, York, Goodman, Amana, True, Traulsen, Manitowoc Ice, Hoshizaki, and Scotsman, spanning both residential HVAC and commercial refrigeration.

📌 Learn more: licensing & credentials | commercial refrigeration | installation