Furnace Not Heating in El Cerrito, CA

Furnace Not Heating in El Cerrito

El Cerrito is a heating town more than a cooling one. The marine layer keeps summers mild, so when people call us it's far more often about a furnace or wall heater that's stopped putting out heat than an AC that's failed. The housing stock here runs from stucco bungalows in the flats to 1940s through 1960s ranches and split-levels climbing off Moeser Lane and Barrett Avenue, and a lot of these homes still run their original gas wall or floor furnace.

On most of these calls the fix is one part: a cracked igniter, a carboned flame sensor, a limit switch tripped by a blocked grille, or a tired control on a newer ducted unit. What changes the conversation in El Cerrito is the age of the equipment. Once a wall or floor furnace is decades old, which is common on these long-held family homes, we stop at just clearing the no-heat complaint and start inspecting the heat exchanger for cracks, because an old unit with a CO risk is a safety call.

We run combustion analysis and CO testing on every gas furnace we open in El Cerrito. We provide a written repair estimate after the on-site diagnosis and before any work starts. If we find a cracked heat exchanger on original equipment, we show it to you on camera and walk through repair versus a heat pump or mini-split conversion, which fits well on El Cerrito's remodeled hillside homes.

Common causes

Hot surface igniter has failed. It's the number one reason a newer gas furnace won't fire up. The element cracks after years of heating and cooling, and once it quits glowing, nothing lights the burners. We confirm with a continuity test and replace it. Quick fix on most units.

Dirty or failed flame sensor. The furnace lights and shuts off within seconds because the sensor can't prove the flame, so the board closes the gas valve for safety. Cleaning the carbon off usually restores it. The sensor itself only gets swapped when it's truly failed, not just dirty.

Pilot and thermocouple on an original wall furnace. Many El Cerrito homes still run a pre-1970s wall or floor furnace with a standing pilot. If the pilot won't stay lit, the thermocouple is usually the culprit, not endless relighting. We test the thermocouple's millivolt output and replace it when it's dropped off.

Limit switch tripped by a blocked grille or dirty filter. A blocked floor grille or a neglected filter restricts airflow, the heat exchanger overheats, and the limit switch shuts the burners to protect it. People read that as a dead furnace. We clear the restriction and confirm the switch resets and holds.

Cracked heat exchanger on original equipment. On El Cerrito's older wall and floor furnaces, a no-heat complaint sometimes uncovers a cracked heat exchanger, which is a CO safety issue. We inspect with a camera and show you the crack. This usually means replacement, and on a remodeled hillside home a heat pump or ducted mini-split conversion is often the cleaner path.

Control board failure on a converted ducted system. On a newer ducted furnace added during a remodel, an aging board can lose the relay that fires the ignition sequence. We read the fault code and trace the sequence to confirm the board is actually the failure.

How we diagnose it

Confirm the thermostat or wall furnace control is calling for heat and the unit is getting power and gas.
Observe a complete ignition sequence and pull any fault code the board has stored.
Run combustion analysis and CO testing, mandatory on every gas furnace we open in El Cerrito.
Inspect the heat exchanger with a camera on any original wall or floor furnace.
Lay out the repair cost, or the repair-versus-conversion math, on a written estimate.

$99 diagnostic, credited toward the repair. You get a written quote before any work begins.

Furnace Not Heating in El Cerrito: common questions

You're based in San Ramon. Do you really come out to El Cerrito?

Yes, El Cerrito is in our regular Inner East Bay service area, run the same day as our Berkeley and Richmond routes. It's about a 40 to 45 minute drive up 580 or 24 to 80. Same-day is best-effort, and once your appointment is booked we give you a written arrival time.

Our wall furnace is original to the house. Is it worth fixing or should we switch to a heat pump?

If the fix is an igniter or a flame sensor on a sound unit, repair it, that's a couple hundred dollars. If we find a cracked heat exchanger on equipment this old, repair stops making sense. El Cerrito's mild climate is well within heat pump range, so a mini-split or ducted conversion is often the better long-term move on a remodel. We lay out both numbers on the estimate.

The furnace lights but quits after a few seconds. Why?

On a newer furnace that's almost always a dirty flame sensor, the board can't confirm the flame so it shuts the gas for safety. On an original standing-pilot wall furnace it's usually the thermocouple. Both are cheap parts. We check for CO before wrapping up either kind of repair.

Nearby and related

Furnace Not Heating near El Cerrito: Richmond · Albany · Berkeley .

This is usually a furnace repair in El Cerrito job. See our furnace repair overview or the El Cerrito service area.

Furnace Not Heating in El Cerrito

Repairs start with a $99 diagnostic, credited toward the fix. Replacing a system? The on-site assessment visit is free. Same-day written findings either way.

Bay Area · 7am–7pm · 7 days · no overtime charges

(925) 999-4095 →

Furnace Not Heating in El Cerrito