Skip to content
Serving San Jose and nearby cities Open 24 hours, 7 days a week · (302) 712-5037

Furnace Repair in Los Gatos, CA

The short answer

Most furnace problems in Los Gatos homes come from dirty filters, failed igniters or flame sensors, thermostat issues, or blower faults, and a technician can usually fix them on the first visit. Bay Area Air District rules don't force you to replace a working furnace, so repair is often the sensible choice until the unit truly fails.

Los Gatos winters are mild by most standards, but they are damp, and the nights get cold enough that a furnace that won't start becomes a real problem fast. Because many local furnaces sit idle through the long, dry summer, the first chilly evening of fall is often when hidden problems show up: a burner that clicks but never lights, a blower that hums without moving air, or a burning-dust smell that lingers. CoolVantage AC Repair sends technicians from our San Jose base, about 9 miles away, to homes across Los Gatos in ZIP codes 95030 and 95032. We diagnose the actual cause, explain it in plain terms, and fix what needs fixing.

Why Los Gatos Furnaces Act Up After Summer

The Santa Clara Valley has a Mediterranean climate: dry summers and mild, damp winters. That pattern is hard on heating equipment in a specific way. A furnace may sit unused for months, collecting dust on the burners and flame sensor, while filters clog from summer air-conditioning use or dry-season dust. When the heat finally kicks on, those small issues add up.

Moisture matters too. Damp winter air can corrode ignition parts and electrical connections, especially on furnaces installed in garages, crawlspaces, or attics. Older homes in town may also have duct runs that were added or rerouted over the years, which can restrict airflow and make a furnace overheat and shut itself off.

Common Furnace Problems We Fix

When you call us for furnace repair in Los Gatos, the technician starts by confirming what the system is doing, then tests the parts most likely to be involved. Typical repairs include:

  • Igniters that are cracked or worn out, leaving the furnace unable to light
  • Dirty or failing flame sensors that let the burner light briefly and then shut off
  • Blower motors, capacitors, and belts that make noise or stop moving air
  • Limit switches tripping because of clogged filters or restricted ducts
  • Thermostat wiring, settings, or batteries that keep the furnace from getting a call for heat
  • Pressure switch and inducer motor faults that stop the startup sequence
  • Clogged condensate lines on high-efficiency furnaces, which can trigger shutdowns

What to Check Before You Call

A few quick checks can save time and sometimes solve the problem outright. Make sure the thermostat is set to heat and the setpoint is above room temperature. Replace the filter if it looks gray or clogged. Confirm the furnace power switch, usually a light switch on or near the unit, is on, and check the breaker panel.

If the furnace still won't run, or if you smell gas, see scorch marks, or hear loud banging at startup, stop and call for service. If you smell gas, leave the house first and contact your gas utility. Those situations should not be handled as do-it-yourself fixes.

Repair or Replace? How Local Rules Fit In

Homeowners often ask whether new Bay Area air quality rules mean they should replace their furnace now. They don't. The Bay Area Air District's appliance rules do not require replacing working equipment. They apply only when an existing furnace fails or is replaced.

What the rules do change is the future. Natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard, which in practice points homeowners toward heat pumps when a furnace is replaced after that date. So if your furnace is in decent shape, a repair can keep it running for years. If it is near the end of its life, it is worth thinking ahead about whether a heat pump makes sense for your home.

If you go that route, BayREN and your local clean energy provider may offer heat pump and electrification incentives. Amounts and availability change by funding cycle, so we confirm the current offer before including it in a quote. Note that the federal 25C tax credit only covered qualifying heat pumps placed in service before December 31, 2025, and it is not available for new installations.

Serving Los Gatos and Nearby Towns

Along with Los Gatos, our technicians handle furnace repair in Monte Sereno, Campbell, Saratoga, Cupertino, and Santa Clara. Whichever town you're in, you get the same approach: a clear diagnosis, an explanation of your options, and a repair that addresses the cause rather than just the symptom.

More services in Los Gatos

Related

What to expect

How a visit goes

  1. Clear explanations

    We show you what's wrong, tell you why it happened, and answer your questions in plain language. You shouldn't need HVAC experience to make a good decision about your own system.

  2. Options, not pressure

    If a repair will keep your equipment running well, we'll say so. If replacement makes more sense, we'll walk you through why and what your choices are, including heat pump and ductless options.

  3. Respect for your home

    We protect floors, clean up after ourselves, and leave the work area the way we found it. Before we leave, we walk you through what we did and how your system should run.

FAQ

Common questions

Don’t see your question? Call (302) 712-5037 and we’ll talk it through.

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

This is often a dirty or failing flame sensor, which can't confirm the burner is lit and shuts off the gas as a safety measure. Overheating from a clogged filter or blocked vents can cause similar short cycling.

Do I have to replace my gas furnace because of Bay Area Air District rules?

No. The rules don't require replacing working equipment. They apply only when a furnace fails or is replaced, and the zero-NOx standard covers furnaces manufactured from 2029.

Is it worth repairing an older furnace?

It depends on the age, the condition of the heat exchanger, and the cost of the repair compared to the unit's remaining life. Our technician will lay out the options so you can decide.

What should I do if I smell gas near my furnace?

Leave the house right away, avoid using switches or flames, and call your gas utility from outside. Once the utility has made it safe, we can inspect and repair the furnace.

Which parts of Los Gatos do you serve?

We serve homes throughout Los Gatos in ZIP codes 95030 and 95032, plus nearby Monte Sereno, Campbell, Saratoga, Cupertino, and Santa Clara.

Are there rebates if I switch to a heat pump instead of repairing?

BayREN and local clean energy providers may offer incentives, but amounts change by funding cycle, so we confirm the current offer first. The federal 25C credit no longer applies to new installations.

Tell Us What Your System Is Doing

Whether it's a breakdown, a system that's struggling to keep up, or a plan to move to a heat pump, reach out and describe what's going on. We'll set up a visit, find the cause, and walk you through your options.

Request Service Call (302) 712-5037
Call (302) 712-5037 Request Service