Emergency HVAC Repair in San Jose

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An HVAC emergency in San Jose looks different depending on where you are standing. In a Willow Glen bungalow it might be a dead AC during a heat wave with an older parent in the house. In a Downtown restaurant it is a walk-in cooler warming up during the dinner rush. In a North San Jose office it is a server closet climbing past safe temperatures on a Saturday. Cool Aid answers all three, 24 hours a day, for homes and businesses.

We have repaired heating, cooling and refrigeration in the South Bay since 1966, from our shop at 3511 Thomas Rd in Santa Clara, next door to San Jose. Call 1-800-266-5243 any time. This page covers what to do in the first few minutes, and when a problem really cannot wait until morning.

Is it an emergency, or can it wait for morning?

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• A burning or electrical smell from the furnace, air handler or outdoor unit (turn the system off first)
• A carbon monoxide alarm (get everyone out and call 9-1-1)
• No cooling during a San Jose heat wave with infants, older adults or anyone with a health condition in the home
• No heat on a cold night for the same vulnerable household members
• A breaker that trips again as soon as you reset it
• A walk-in cooler, reach-in or prep cooler in a food business that cannot hold 41°F
• A server room or network closet where the cooling has stopped

Usually safe to wait for regular hours

• The system runs but cools or heats a little less than normal on a mild day
• A slow drip from the condensate line that you can catch in a pan
• A new noise with no smell, and the house is at a safe temperature

Before you call, check the three things that account for many after-hours calls: the thermostat (batteries, mode, schedule), the breaker for the indoor and outdoor units, and the air filter. Our emergency HVAC playbook walks through each check step by step.

Emergencies at home

San Jose summers bring stretches of hot, dry weather, and that is when older capacitors, fan motors and contactors give out. Winter failures are more often ignition problems: a dirty flame sensor, a failed igniter, or a pressure switch on a furnace that has not been serviced. In older neighborhoods such as Naglee Park and the Rose Garden, we also get calls for wall heaters and floor furnaces, which we work on.

If the fix is a repair, we make it and it carries our 1-year parts and labor warranty. If the equipment has failed for good, we will say so plainly. A replacement furnace, AC or heat pump in a San Jose single-family home or duplex generally needs a City mechanical permit, and sometimes an electrical permit (City of San José), so we can restore safe operation or temporary comfort where possible and then plan the replacement properly rather than rush it at midnight. For the regular repair side, see AC repair in San Jose. For a general look at what emergency service involves across the region, see our Bay Area emergency HVAC repair page.

Emergencies at a business

Restaurants and food businesses

For a San Jose restaurant, a refrigeration failure is also a food safety problem. The Santa Clara County Department of Environmental Health inspects San Jose food facilities, and cold-held food must stay at or below 41°F. Food held between 42°F and 50°F is a minor violation, and above 50°F is a major one (County DEH food facility guidance). While you wait for us:

• Keep the walk-in and reach-in doors closed
• Write down product temperatures and the time you took them
• Move the most sensitive items to a unit that is still holding temperature
• Check that the condenser is not blocked and the unit has power

We have handled this situation in Downtown San Jose. When a Taco Bell's walk-in cooler failed during peak hours, our technicians repaired it and the location avoided a food loss. Lotus Thai in San Jose relies on us for both preventive maintenance and emergency repair of its HVAC and refrigeration. Cool Aid is factory-authorized service for True, Traulsen, Turbo Air, Dukers, Manitowoc Ice, Hoshizaki and Scotsman equipment. For cooler-specific issues, see walk-in cooler repair in San Jose.

Offices, retail and server rooms

A rooftop unit that quits on a hot afternoon empties an office or a shop quickly. A server closet that loses cooling is more urgent still, because equipment temperatures climb fast once airflow stops. If you have a server room, prop the door open, shut down non-essential equipment and call. Our commercial HVAC in San Jose and server room cooling in San Jose pages cover these systems in more detail.

What happens when you call

When you call, we ask what the equipment is, what it is doing, and whether anyone is at risk, then send a technician. We do not promise a specific arrival time, because that depends on where our crews are and how many calls are open during a heat wave. We will give you an honest estimate on the phone. Our technicians are EPA Universal certified and work under California C-20 and C-38 licenses, so one visit can cover both the HVAC side and the refrigeration side.

If you are comparing emergency providers, our list of emergency HVAC companies in San Jose includes companies other than ours. For everything else we do in the city, go back to the San Jose HVAC and refrigeration overview.

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Frequently asked questions

Written and reviewed by Jim McKinny, owner of Cool Aid Air Conditioning & Refrigeration — California C-20 and C-38 licensed, EPA Universal certified, second generation of a family business serving the Bay Area since 1966. Every job we complete is backed by our 1-year parts & labor warranty.