The short answer
AllPro HVAC Services repairs gas furnaces in Commerce, CA (ZIP 90040), including ignition, airflow, thermostat, and safety-control problems. We check that the furnace runs safely, explain whether a repair or a replacement makes more sense, and offer 24/7 emergency service.
Winters in Commerce are mild, so most furnaces here sit idle for months and then get asked to work on the first cold nights. That long rest is when problems show up: a burner that won't light, a blower that runs but blows cool air, or a burning-dust smell that doesn't fade. AllPro HVAC Services repairs gas furnaces in Commerce homes across ZIP 90040, about 8 miles southeast of our Los Angeles base. We find the actual cause, explain it in plain terms, and fix what's needed so your heat runs safely. If your heat goes out at night or on a weekend, we offer 24/7 emergency service.
Common Furnace Problems in Commerce Homes
Los Angeles has a Mediterranean climate with dry summers and mild winters. A furnace in Commerce may run only on scattered cool mornings and evenings, then sit unused for most of the year. Dust settles on burners and sensors, filters get forgotten, and small parts that were fine last spring may not respond the first time the thermostat calls for heat.
These are the issues we see most often when a furnace has been sitting:
- Furnace clicks or tries to start but never lights
- Burners light, then shut off after a few seconds
- Blower runs, but the air from the vents is cool or lukewarm
- Weak airflow in some rooms, often from a clogged filter or a duct problem
- Short cycling, where the furnace turns on and off too often
- A burning smell that lasts past the first few minutes of the season
- Squealing, rattling, or banging from the cabinet or ductwork
- Thermostat that doesn't seem to control the furnace at all
How We Diagnose and Repair Your Furnace
We start by listening to what you've noticed: when the problem started, what the furnace does, and any sounds or smells. Then we test the system instead of guessing. That usually means checking the thermostat signal, the igniter and flame sensor, the gas valve operation, the pressure and limit switches, the blower motor and capacitor, the control board, and the filter and return air path.
Once we know the cause, we tell you what's wrong, what the repair involves, and what your options are before any work begins. Many furnace failures come down to a single part, such as a dirty flame sensor, a failed igniter, or a tripped limit switch caused by restricted airflow. When the real cause is airflow, we point that out, because replacing a part without fixing a blocked return or a matted filter just brings the problem back.
Safety Checks on Every Furnace Call
A gas furnace burns fuel inside your home, so every repair visit includes basic safety checks along with the fix. We look at the flame pattern, confirm the venting is drawing exhaust out of the house, inspect the heat exchanger area for visible cracks or rust, and make sure the safety switches shut the furnace down the way they're designed to.
If you smell gas, leave the house first and call your gas utility or 911 from outside. Then contact us for the furnace repair. If a carbon monoxide alarm goes off, get everyone outside and call for help before anything else. Don't try to restart a furnace that has shut itself off more than once. Those shutdowns are usually a safety control doing its job, and the reason needs to be found.
Repair or Replace? What Commerce Homeowners Should Know
Most furnaces we see can be repaired. When a unit is older, needs a major part like a heat exchanger, or keeps breaking down, we'll give you a straight comparison of repair versus replacement so you can decide.
If you're considering a new gas furnace, know that South Coast AQMD Rule 1111 limits NOx emissions from natural-gas fan-type central furnaces sold and installed in the Los Angeles region. The district has been amending that rule toward zero-emission requirements and sets and revises the compliance dates, so check the current rule before planning a replacement. Some homeowners look at heat pumps instead. Rebates for those depend on which electric utility serves your address. Many homes outside the City of Los Angeles are served by Southern California Edison rather than LADWP, so we confirm the current offer for your home before quoting it. The federal 25C tax credit for heat pumps applied only to systems placed in service before December 31, 2025, and it isn't available for new installations after that date.
Serving Commerce and Nearby Cities
We work on furnaces throughout Commerce and the surrounding area, including Bell, Maywood, Vernon, Monterey Park, and Huntington Park. Whether your furnace sits in a hall closet, a garage, or an attic, we'll come to you, find the problem, and get your heat back on. For no-heat situations after hours, our 24/7 emergency service is available.
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