Skip to content
Serving San Jose and nearby cities Open 24 hours, 7 days a week ยท (669) 800-1182

Furnace Repair in Newark, CA

The short answer

If your Newark furnace won't heat, short-cycles, or smells off, we find the cause and repair it when a repair makes sense. Bay Area Air District rules don't require replacing a working furnace, so fixing a sound unit is often the practical choice. Replacement rules change for furnaces manufactured from 2029.

Newark winters are mild compared with much of the country, but the damp, chilly nights from late fall through early spring are exactly when a gas furnace earns its keep. When yours stops heating, blows cold air, or starts making noises it didn't make last year, SwiftAir Conditioning Repair can diagnose the problem and fix it. We work on furnaces in homes throughout Newark's 94560 ZIP code, about 10 miles northwest of our San Jose base. This page covers what usually goes wrong, how a repair visit works, and how current Bay Area Air District rules affect your choice to repair or replace.

Common furnace problems in Newark homes

The Santa Clara Valley and the neighboring Bay shore have a Mediterranean climate with dry summers and mild, damp winters. Newark sits close to the Bay, so many furnaces here run in short bursts on cool evenings and then sit unused for months. That pattern causes its own problems. Dust settles on burners and sensors over the summer, igniters that worked fine last spring fail on the first cold night, and filters that were never changed restrict airflow once the system starts working again.

These are the symptoms homeowners most often call us about:

  • Furnace runs, but the air from the vents is cool or lukewarm
  • Burners light and then shut off after a few seconds
  • Blower won't turn on, or won't turn off
  • Clicking, rattling, squealing, or a loud bang at startup
  • Thermostat calls for heat but nothing happens
  • A burning-dust smell that doesn't fade after the first few cycles

How a furnace repair visit works

We start by listening to what you've noticed: when the problem started, what the furnace does, and whether anything changed recently. Then we test the system instead of guessing at parts.

Once we know the cause, we explain it in plain terms and give you your options before doing any work. If the repair is straightforward, such as a dirty flame sensor, a failed igniter, or a bad pressure switch, we can usually take care of it during the visit when the part is on hand.

  • Check thermostat settings, wiring, and power to the furnace
  • Inspect the filter, blower, and airflow
  • Test the ignition sequence, flame sensor, and safety switches
  • Look at the burners, heat exchanger, and venting for signs of trouble
  • Confirm the furnace heats properly and cycles normally after the repair

Repair or replace? What the Air District rules mean for you

Many Newark homeowners have heard that gas furnaces are being phased out. Here is what the rules actually say. The Bay Area Air District's appliance rules do not require you to replace working equipment. They apply only when an existing furnace fails or is replaced. If your furnace can be repaired safely and reliably, you are free to keep using it.

Under Air District Rule 9-4, natural gas furnaces manufactured from 2029 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 aging and needs expensive repairs, it can be worth weighing that timeline before you decide.

If you're considering a heat pump, keep in mind that the federal 25C tax credit covered qualifying heat pumps placed in service before December 31, 2025, and it is not available for new installations after that date. Local incentives may still help. Bay Area homeowners can check BayREN and their local clean energy provider for current heat pump and electrification programs. Amounts and availability change by funding cycle, so we confirm the current offer before including it in any quote.

When to stop and call for help right away

Some furnace problems are safety issues, not comfort issues. If you smell gas, don't flip switches or try to relight anything. Leave the house and call your gas utility from outside. If a carbon monoxide alarm goes off, get everyone outside and call 911. Once the utility or emergency responders say it's safe, we can come out and find the cause.

Scorch marks near the furnace, a yellow or flickering flame instead of a steady blue one, or soot around vents are also reasons to shut the system off and have it checked before running it again.

Furnace repair in Newark and nearby cities

We repair furnaces in homes across Newark, ZIP code 94560, in Alameda County. We also serve nearby Fremont, Milpitas, Sunnyvale, Mountain View, and Los Altos. Whether you have an older gas furnace in a hall closet or a newer unit in the garage or attic, tell us what's going on and we'll help you sort out whether a repair, a tune-up, or a longer conversation about replacement makes the most sense.

More services in Newark

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 Bay Area 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 furnace that can be repaired safely can stay in service.

What changes in 2029?

Under Air District Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard. In practice, that points homeowners toward heat pumps when a furnace is replaced after that date.

Why does my furnace smell like burning when I first turn it on?

After months of sitting unused, dust collects on the burners and heat exchanger and burns off during the first few cycles. If the smell lingers, smells like gas, or seems electrical, turn the furnace off and have it checked.

Can I still get the federal tax credit for 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. Check BayREN and your local clean energy provider for current local incentives.

My furnace lights and then shuts off. What's usually wrong?

A dirty or failing flame sensor is a common cause, but a clogged filter, a venting problem, or a faulty pressure switch can do the same thing. We test the system to find the actual cause instead of replacing parts by guesswork.

Do you serve cities near Newark?

Yes. Along with Newark, we repair furnaces in Fremont, Milpitas, Sunnyvale, Mountain View, and Los Altos.

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.

(669) 800-1182
Call (669) 800-1182 Request Service