Furnace Repair in Southern California

Most furnace repairs range from $150 to $600. Common repairs like igniter replacement run $150–$300. Flame sensor cleaning is typically $75–$150. Heat exchanger replacement can cost $1,500–$2,500 — at that point, replacement is often more cost-effective. We provide a written upfront quote before any work begins.

The most common issues we see are failed igniters, dirty flame sensors, failing capacitors (on heat pumps), clogged filters causing overheating, faulty thermostats, and cracked heat exchangers. Most igniter and flame sensor issues are relatively straightforward repairs. A cracked heat exchanger is a safety issue that requires immediate attention.

No — if you smell gas, leave the home immediately and call your gas company's emergency line. Do not use any electrical switches, light switches, or open flames. Once the gas company has cleared the home, call us to inspect the furnace before restarting it.

If your furnace is under 15 years old and the repair cost is less than 50% of replacement cost, repair is usually the right choice. Older systems with cracked heat exchangers, failed heat exchangers, or repeated breakdowns are often better candidates for replacement. A new high-efficiency furnace can reduce your heating bills by 20–40%.

Short cycling — when a furnace turns on and off frequently without completing a full heating cycle — is usually caused by a clogged air filter restricting airflow, an oversized furnace, a faulty flame sensor, or an overheating limit switch. It should be diagnosed and repaired promptly, as short cycling puts extra wear on the system.

Yes. An annual furnace tune-up is the single best way to prevent unexpected breakdowns, extend the life of your system, and maintain manufacturer warranty coverage. Our Comfort Club members receive a furnace tune-up every fall as part of their annual membership.

The heat exchanger is the component that separates the combustion gases from the air circulating through your home. A cracked heat exchanger can allow carbon monoxide to enter your living space — a serious safety hazard. Our technicians inspect heat exchangers on every furnace service call. If we find a crack, we'll explain your options clearly.