AC Repair in Redwood City

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Redwood City's old motto, "Climate Best by Government Test," is a fair description of most of the year. It also explains why so many air conditioners here get ignored until a warm inland afternoon arrives and the system that sat idle for months will not start. Cool Aid repairs central air conditioners and heat pumps in Redwood City homes, working from our Santa Clara shop with the same family ownership we have had since 1966.

Why AC problems show up the way they do in Redwood City

Redwood City sits between the cooler bayside and the warmer hills, so a home near Woodside Road can need cooling on days when a house closer to the Bay barely notices the heat. That pattern shapes the repairs we see. Systems that run hard for a few weeks and then sit for months tend to fail in predictable ways:

• Capacitors and contactors that weaken over the idle season and fail on the first long run of summer.
• Clogged condensate drains in attic and closet air handlers, which can trip a float switch and shut cooling off entirely.
• Dirty outdoor coils on condensers tucked beside fences or under landscaping, which push head pressure up and trip the unit on hot days.
• Slow refrigerant leaks that only become obvious when the system finally has to work at full capacity.
• Older add-on systems in homes that were built without air conditioning and had a condenser added to an existing furnace later, sometimes on ductwork sized only for heat.

Many older Redwood City houses still heat with wall or floor furnaces and never had central air at all. If your home uses a window unit or a ductless system instead, tell us when you call so we bring the right parts and gauges.

How we handle an AC repair visit

Every visit is run by a technician who holds EPA Universal certification, working under our California C-20 license. The process is the same whether the problem is a dead condenser or a system that runs but will not cool:

1. Confirm the complaint

We check the thermostat, breaker, disconnect and filter first. A surprising number of no-cooling calls end there, and we would rather tell you that than sell you a part.

2. Test, do not guess

We measure electrical components, temperature split across the coil, and refrigerant pressures. If refrigerant is low, we look for the leak rather than simply topping the system off, because a recharge without a repair just delays the next failure.

3. Explain options in writing

You get a clear description of what failed, what the repair involves, and whether the system is worth fixing. Every repair carries our 1-year parts and labor warranty. For a sense of typical repair pricing across the South Bay and Peninsula, see our AC repair cost guide.

Repair or replace?

If your air conditioner is well into its second decade, uses an outdated refrigerant, or has needed several repairs in a few seasons, replacement may make more sense than another fix. Our article on when to replace your AC in Redwood City walks through the warning signs in detail. When replacement is the better call, our AC and heat pump installation page for Redwood City covers what the job involves locally.

One local factor worth knowing: WestLight Energy, formerly Peninsula Clean Energy and San Mateo County's community electricity provider, offers a heat pump HVAC rebate of up to $2,500 that can be combined with other incentives (source). A heat pump replaces both your air conditioner and your gas furnace, so if both are aging, it can be worth pricing that option before paying for a major AC repair. Check the program's current terms before you sign anything.

Permits for bigger jobs

Most repairs, such as a capacitor, fan motor, or drain line, do not need a permit. Replacing equipment does. Redwood City accepts permit submittals online only, and an HVAC replacement needs a mechanical permit, plus an electrical permit if new circuits or panel work are involved (source). California may also require HERS verification on HVAC changeouts (source). We handle that paperwork when a repair turns into a replacement.

When it is an emergency

We offer 24/7 emergency service. A system that is smoking, tripping its breaker repeatedly, or smells of burning should be shut off at the thermostat and the breaker before you call. For anything outside normal hours, our emergency HVAC repair page explains what to do while you wait.

If you smell gas near your furnace or water heater, that is not an AC problem: leave the house, call 9-1-1, then call PG&E at 1-877-660-6789 (source).

Keep the next repair away

Because Redwood City systems sit idle for long stretches, a spring check before the first warm spell catches weak capacitors and blocked drains while they are cheap to fix. Our yearly HVAC maintenance plan covers cooling in spring and heating in fall. If your heating is the problem instead, see furnace repair in Redwood City.

For everything else we do in town, from commercial refrigeration to server room cooling, visit our Redwood City HVAC and refrigeration page or our general residential HVAC repair services. If you are still comparing contractors, our list of HVAC companies in Redwood City includes several firms other than ours. Pages on this site are reviewed by Jim McKinny, our second-generation owner.

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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.