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Heating Repair in Los Altos, CA

The short answer

SwiftAir repairs gas furnaces, heat pumps, thermostats, and duct problems for Los Altos homes. We find the actual cause, explain your options, and walk you through how Bay Area Air District rules affect a repair-or-replace decision. Those rules don't force you to replace working equipment.

Winters in Los Altos are mild by most standards, but the Santa Clara Valley's damp, chilly nights make a working heater matter when one quits. SwiftAir Conditioning Repair is based in San Jose, about 10 miles east, and we repair gas furnaces, heat pumps, and the controls and ductwork that connect them for homes throughout Los Altos and the 94024 ZIP code. This page covers the problems we're called about most, how a repair visit works, and how current Bay Area Air District rules affect a repair-or-replace decision.

Heating Problems We Fix in Los Altos Homes

Because the valley's winters are mild, many heating systems sit unused for months and then run hard through a stretch of cold, wet weather. That on-and-off pattern tends to expose problems all at once: a dirty flame sensor, a weak igniter, a clogged filter that has been in place since last year, or a thermostat with dead batteries.

These are the symptoms that usually lead Los Altos homeowners to call us:

  • Furnace runs but blows cool or lukewarm air
  • Burners light, then shut off after a few seconds
  • No response at all when the thermostat calls for heat
  • Heat pump running constantly without warming the house
  • Some rooms warm while others stay cold
  • Banging, scraping, or squealing noises from the unit or ducts
  • A burning or electrical smell that lasts beyond the first few minutes of the season

What Happens During a Heating Repair Visit

We start with the symptom you describe, then check the whole system rather than swapping parts on a hunch. On a gas furnace that means looking at the thermostat signal, igniter, flame sensor, gas valve operation, inducer motor, pressure switches, limit switches, and blower. On a heat pump we check the outdoor unit, defrost operation, refrigerant-side performance, and backup heat strips if your system has them.

Once we find the cause, we explain it in plain terms and lay out your options before doing any work. If the fix is simple, such as cleaning a flame sensor or replacing a failed capacitor, we can usually handle it on the spot. If a part has to be ordered, we tell you what it is and why it's needed.

Repair or Replace? What Air District Rules Mean for You

Many Los Altos homeowners have heard that gas furnaces are being phased out and worry they'll be required to rip out a heater that still works. They won't. The Bay Area Air District's appliance rules don't require replacing working equipment. They apply only when an existing furnace fails or is replaced.

What the rules do change is the long-term picture. Under Air District Rule 9-4, natural gas furnaces manufactured from 2029 on must meet a zero-NOx emission standard. In practice that points homeowners toward heat pumps when a furnace is replaced after that date. If your furnace is repairable today, repairing it is a reasonable choice. If it's near the end of its life, it's worth knowing where replacement options are heading before you decide.

On incentives: the federal Energy Efficient Home Improvement Credit (25C) covered qualifying heat pumps placed in service before December 31, 2025, so it's not available for new installations after that date. Bay Area homeowners can still check BayREN and their local clean energy provider for current heat pump and electrification incentives. Amounts and availability change by funding cycle, so we confirm the current offer before including it in any quote.

Heat Pump Heating Repair

More Los Altos homes now heat with heat pumps, and these systems have their own failure points. A heat pump that steams or goes quiet for a few minutes on a cold, damp morning is often just running a normal defrost cycle. A unit that ices over and stays iced, runs nonstop, or relies heavily on backup heat usually needs attention.

Common causes include a faulty reversing valve, defrost control or sensor failures, a low refrigerant charge from a leak, and restricted airflow from dirty filters or coils. We diagnose these the same way we do furnaces: confirm the cause first, then recommend a fix.

Serving Los Altos and Nearby Cities

We provide heating repair across Los Altos, including the 94024 ZIP code, and in nearby Mountain View, Sunnyvale, Cupertino, Santa Clara, and Saratoga. If your heat is out, tell us what you're seeing when you call, such as error codes, sounds, or when the problem started. That helps us arrive ready.

Before the rainy season, a few minutes of prep can prevent a no-heat call. Replace the filter, put fresh batteries in the thermostat, clear storage away from the furnace, and run the heat briefly on a mild day so problems show up before you actually need it.

More services in Los Altos

Related

What to expect

How a visit goes

  1. Clear answers before work begins

    We show you what's wrong, explain your options, and let you decide. Work starts after you approve it.

  2. Repair first when it's reasonable

    Not every problem calls for new equipment. If a repair will keep your system running well, we'll recommend that instead of a replacement.

  3. Equipment that fits your home

    When you do need a new system, we size it for your home, your ductwork, and how hot your part of the valley gets. We don't simply match the old unit's label.

FAQ

Common questions

Do I have to replace my gas furnace because of the new Air District rules?

No. The Bay Area Air District rules don't require replacing working equipment. They apply only when an existing furnace fails or is replaced, so a working or repairable furnace can stay in service.

Why does my furnace start and then shut off after a few seconds?

A dirty or failing flame sensor is a common cause. Others include airflow problems, pressure switch faults, and venting issues. We test each one to find the actual cause instead of guessing.

Is there still a federal tax credit for installing a heat pump?

The federal 25C credit covered qualifying heat pumps placed in service before December 31, 2025. It isn't available for new installations after that date. BayREN and your local clean energy provider may offer current incentives, and we confirm those before quoting them.

Why is my heat pump blowing cool air in heating mode?

It may be in a normal defrost cycle, which is brief. If cool air continues, the cause could be a reversing valve problem, low refrigerant, or a control issue that needs diagnosis.

Do you repair heating systems outside Los Altos?

Yes. Along with Los Altos, we serve Mountain View, Sunnyvale, Cupertino, Santa Clara, and Saratoga from our base in San Jose.

What should I check before calling for heating repair?

Make sure the thermostat is set to heat and has working batteries, check the filter, and confirm the furnace switch and breaker are on. If those are fine and there's still no heat, give us a call.

Need Heating or Cooling Help in San Jose?

Tell us what your system is doing, or not doing, and we'll set up a visit to find the cause and walk you through your options.

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