What to expect from our Furnace Repair team
When a furnace will not start, blows cold air, or keeps shutting off, the cause could be an ignitor, flame sensor, airflow restriction, or another fault. LC Heating & Air diagnoses and repairs gas and electric furnaces across Greater Los Angeles. We check combustion safety on gas systems and provide a written estimate before repair work begins. View our recommended Heat Strip →
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Our Service Benefits
Furnace Repair Cost in Los Angeles
Pricing ranges for common Furnace Repair services. Your actual cost depends on equipment, complexity, and home configuration. We provide an exact written estimate before any work begins.
Service calls start at $125. Prices include parts and labor unless noted. Financing available on equipment installations. Learn about financing →
What Los Angeles Homeowners Say
“Our furnace wasn't heating evenly upstairs. LC found that half of our ductwork in the attic had separated and was blowing hot air into the attic. Repaired everything and now every room heats equally. Professional and transparent.”
“Furnace was making a loud banging noise every time it started. LC diagnosed delayed ignition from dirty burners. Cleaned and tuned the whole system, tested CO levels, explained everything clearly. No upsell, fair price.”
“Called LC because our CO detector went off. Their technician found a crack in the heat exchanger and immediately shut down the furnace. He explained the safety issue clearly, provided a replacement estimate, and didn't try to scare us — just facts. We replaced the system the following week.”
Furnace Repair or a Heating Tune-Up?
- If the furnace has stopped heating or keeps shutting off, schedule a repair diagnosis. If it is still running but has not been checked before cooler weather, a furnace tune-up can uncover worn ignitors, dirty flame sensors, and safety concerns before a breakdown.
- If your heater is blowing cold air, cycling constantly, or your gas bill spiked without explanation, schedule a diagnostic. We include CO testing on every gas furnace service call.
Carbon Monoxide Safety and Furnace Repair
- Carbon monoxide (CO) is a colorless, odorless gas produced by incomplete combustion in gas furnaces. A properly functioning furnace contains all combustion gases within the heat exchanger and vents them safely outside through the flue. When a heat exchanger develops cracks — which happens over time due to the repeated heating and cooling cycles that cause metal fatigue — combustion gases can leak into the conditioned airstream and distribute throughout your home. According to the CDC, carbon monoxide poisoning causes over 400 deaths per year in the United States.
- LC Heating & Air performs a carbon monoxide safety check on every furnace repair call. We measure CO levels at the furnace plenum, the supply registers, and in the ambient room air. We visually inspect the heat exchanger surface and use a camera inspection when visual access is limited. If we detect elevated CO levels or a confirmed heat exchanger crack, we will shut off the furnace immediately and advise against operating it until the issue is resolved.
- If you do not already have CO detectors in your home, install them now — at minimum, one outside each sleeping area and one on each floor. CO detectors cost $20-40 each and they save lives. California law requires CO detectors in all residential dwellings with fossil fuel appliances. This is not optional equipment.
Furnace Maintenance Prevents Emergency Repairs
- The majority of emergency furnace repair calls we receive in Los Angeles are for issues that would have been caught during annual maintenance. A dirty flame sensor that causes nuisance lockouts. A cracked ignitor that finally fails on the coldest night of the year. A failing draft inducer motor that was making unusual noise for weeks before it seized. A clogged condensate drain on a high-efficiency furnace that eventually triggers a safety shutdown. All of these are predictable failure modes that a trained technician identifies during a maintenance visit.
- Annual furnace maintenance — ideally performed in September or October before heating season — includes inspection and testing of every safety and operational component. We clean the burner assembly, test the flame sensor, verify the ignition sequence, inspect the heat exchanger, test the safety limit switches, check the draft inducer, verify proper venting, and test CO levels. The cost of annual maintenance ($90-$150) is a fraction of a single emergency repair call, and it extends the operational life of the furnace by years.
- LC Heating & Air offers annual maintenance plans that include both a fall furnace tune-up and a spring AC tune-up, plus priority scheduling and repair discounts for plan members. Most of our maintenance plan customers go years without needing an emergency repair call because we catch developing issues before they become failures.
Signs you need Furnace Repair
Not sure if you need service? Call us — we'll give you an honest answer.
(323) 970-3113 — Request a diagnosisOur Furnace Repair process
Safety first
We check for gas leaks and CO levels before diagnosing. If there's a safety issue, we address it first.
Full system diagnosis
We check the heat exchanger, ignitor, gas valve, limit switch, control board, blower motor, and flue venting.
Written price estimate
We explain the issue and give you a flat price. If repair doesn't make sense, we'll tell you.
Repair & safety test
We repair the issue, verify combustion, test CO levels, and confirm all safety limits are operating correctly.
300+ verified reviews
Furnace Repair — by city
Furnace Repair crews cover the Valley, Eastside, and Westside with licensed technicians familiar with LA heating codes and gas line requirements.
Common questions about Furnace Repair in Los Angeles
What customers say about Furnace Repair
Verified reviews from Los Angeles homeowners who used our Furnace Repair service.
“Furnace was making a loud banging noise every time it started. LC diagnosed delayed ignition from dirty burners. Cleaned and tuned the whole system, tested CO levels, explained everything clearly. No upsell, fair price.”
“Called LC because our CO detector went off. Their technician found a crack in the heat exchanger and immediately shut down the furnace. He explained the safety issue clearly, provided a replacement estimate, and didn't try to scare us — just facts.”
“Our furnace wasn't heating evenly upstairs. LC found that half of our ductwork in the attic had separated and was blowing hot air into the attic. Repaired everything and now every room heats equally. Professional and transparent.”
