AC Repair in Palo Alto

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Palo Alto does not need air conditioning every day of the year, which is exactly why a failure catches people off guard. The system sits idle through the cool months, then the first hot stretch arrives and the condenser will not start, or it runs and blows warm air. Cool Aid has repaired cooling systems for Bay Area families since 1966, and we drive to Palo Alto from our Santa Clara shop to diagnose the problem and fix it properly.

What AC repair looks like in a Palo Alto home

The housing stock here shapes almost every repair call. Many older Palo Alto homes were never built with central air, so the cooling equipment was added later, sometimes decades later, and often squeezed into whatever space was available. Eichler homes add their own twist: most were built with radiant heat in the slab and no attic ductwork, so cooling usually comes from ductless mini-splits, a heat pump with ducts run through the roof, or equipment added in a later remodel. Each of those setups fails in its own way, and a technician who assumes a standard furnace-and-coil layout will waste your time.

Newer and remodeled homes in the city are more likely to have a heat pump that does both heating and cooling. When a heat pump stops cooling, it frequently means your winter heat is at risk too, so we check the reversing valve, defrost controls and outdoor coil on the same visit rather than treating it as a summer-only problem.

Common cooling problems we repair

• Warm air from the vents: often a failed capacitor, contactor or condenser fan motor, sometimes a refrigerant leak.
• Ice on the indoor coil or refrigerant lines: usually restricted airflow from a clogged filter or dirty coil, or low refrigerant charge.
• Outdoor unit hums but will not start: a common failure after months of sitting idle through a mild Palo Alto winter.
• Water around the air handler: a blocked condensate drain or cracked pan.
• Mini-split error codes: communication faults between indoor heads and the outdoor unit, sensor failures and drain problems.
• Breaker trips when the AC starts: a failing compressor or a wiring fault that needs attention before it damages equipment.

Palo Alto runs on its own utility

Unlike most of the Peninsula, Palo Alto is not served by PG&E. City of Palo Alto Utilities (CPAU) is a city-owned utility that supplies both electricity and natural gas to homes here (source). That matters on a repair call in a few practical ways. If an electrical problem at the meter or service drop is behind your AC failure, CPAU is the utility you call, not PG&E. And if you ever smell gas near a furnace or water heater while we are working, the instructions are specific to this city: leave the house, call 9-1-1, then call City of Palo Alto Utilities.

CPAU is also actively encouraging homeowners to move from gas heating to electric heat pumps. If your AC is old and paired with a gas furnace, a repair visit is a sensible moment to ask whether replacing both with a single heat pump makes more sense. Our Palo Alto heat pump installation page explains the CPAU rebate and the reservation step you must complete before any work starts.

Repair or replace?

We give you a straight answer. A system that is relatively young and has one failed part should be repaired. An older system that uses phased-out refrigerant, has a leaking coil, or has needed repeated service is often a candidate for replacement. We explain the findings, show you the failed component where we can, and let you decide. If replacement makes sense, our guide to AC installation in Palo Alto covers sizing, efficiency and what a proper installation includes. For a sense of typical repair costs in the South Bay, see our AC repair cost guide.

How we handle an AC repair

• Diagnosis first: we test electrical components, measure refrigerant pressures and temperatures, and check airflow before recommending anything.
• Licensed and certified: Cool Aid holds California C-20 (HVAC) and C-38 (refrigeration) licenses, and our technicians are EPA Universal certified to handle refrigerant.
• Current refrigerants: our team is trained on the newer low-GWP refrigerants, including R-32, R-454B and R-290, as well as the older systems still common in Palo Alto.
• Brands we work on: Daikin, Amana, Goodman, York, Trane, Carrier and most other residential equipment.
• Warranty: every job carries our 1-year parts and labor warranty.

Cooling failures do not always happen during business hours, so we offer 24/7 emergency service. Our emergency HVAC repair page explains what counts as urgent and what can safely wait until morning.

Keep the next repair from happening

Many of the calls we get in early summer trace back to a system that sat unused and unserviced all winter. A spring tune-up catches weak capacitors, dirty coils and slow drains before the first warm week. Our yearly HVAC maintenance page lists what a visit covers. If you need heating help as well, see our Palo Alto furnace repair page, and for everything else we do in the city, visit our Palo Alto HVAC and refrigeration services page. Our broader residential HVAC repair services page covers the full range of repairs we handle.

Still comparing contractors? Our list of HVAC companies in Palo Alto includes firms other than ours. You can also read about our owner, Jim McKinny, a second-generation HVAC contractor with more than 37 years in the trade.

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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.