Furnace Repair Cost (2026): Prices for Common Repairs

Angi puts the national average furnace repair at $318, based on 27,763 projects, with most homeowners paying $133 to $505. HomeGuide's average range is $125 to $480, with a national average of $300.

Cost by repair

Repair	HomeGuide	Angi
Flame sensor	$80 – $250	$150 – $250
Igniter	$100 – $250	$150 – $500
Thermocouple	$100 – $300	–
Limit switch	$100 – $375	$150 – $300 (relay or high limit)
Thermostat	$190 – $480	$100 – $600
Gas valve	$200 – $800	$200 – $600
Control board	$300 – $650	$200 – $600
Draft inducer motor	$400 – $1,100	$200 – $1,500
Blower motor	$300 – $2,300	$150 – $2,000
Heat exchanger	$1,000 – $3,000	$500 – $1,500 (replacement)

Detailed guides: igniter, gas valve, control board, inducer motor, blower motor and heat exchanger.

Labor and service calls

Item	Cost	Source
Labor	$75 – $150 per hour	HomeGuide
Labor	$50 – $150 per hour	Angi
Minimum charge for small repairs	$100 – $200	Angi
Emergency labor	$140 – $210 per hour	HomeGuide
Emergency labor	$150 – $215 per hour	Angi
Emergency repairs overall	$300 – $1,200	Angi

Angi says emergency work can cost up to twice as much, and lists an after-hours igniter replacement at $350 to $500.

Common symptoms

Furnace clicks but will not light: often a failed igniter or dirty flame sensor, both cheap fixes.
Burners light, then shut off: frequently a dirty flame sensor or a limit switch.
No heat and no sound: thermostat, control board or power problem.
Fan runs constantly or not at all: blower motor, capacitor or control board.
Loud humming or rattling from the vent motor: draft inducer motor.

Repair or replace?

Most repairs under a few hundred dollars are worth doing. A cracked heat exchanger on an older furnace, or a blower motor replacement near the top of its price range, can cost a large share of a new furnace. HomeAdvisor puts a new furnace at $2,823 to $6,897 for most homeowners. See furnace replacement cost.

Prevent repairs

Angi lists an inspection at $80 to $100, and $125 to $200 with cleaning and a tune-up. Filters cost $1 to $35. See furnace tune-up cost.

Common furnace problems

Most furnace repair calls fall into a few groups:

Ignition: a failed igniter or dirty flame sensor.
Airflow: a clogged filter, a failing blower motor or blocked returns.
Controls: a thermostat problem, a bad control board or a tripped limit switch.
Venting and safety: a failed inducer motor or pressure switch.
Gas supply: a gas valve problem or a supply issue.

What you can check first

Make sure the thermostat is set to heat and the setpoint is above room temperature.
Replace the air filter if it is dirty.
Confirm the furnace power switch is on and the breaker has not tripped.
Check that the furnace door panel is closed securely; many furnaces will not run with it open.

Leave everything inside the furnace to a licensed technician, especially anything involving gas.

What affects the price

The part that failed and how easy it is to get.
Diagnostic or trip fees, which some companies apply to the repair.
Weekend, night or holiday service.
The age and brand of the furnace.

More on repair or replace

A single repair on a sound furnace is usually worth doing. It becomes a harder decision when the furnace is older, needs repairs every season, heats unevenly or has a cracked heat exchanger. Ask for both a repair price and a replacement quote in those cases.

Questions to ask

What exactly failed, and can you show me?
Does the diagnostic fee apply toward the repair?
Is the part and labor covered by a warranty?

In Texas

Cold snaps in Texas are often short but sudden, and many homes call for repairs on the same few days. Testing the furnace before the first cold front lets you schedule repairs at a normal rate instead of waiting during a rush.

Common furnace problems and likely causes

Furnace does not turn on. Check the thermostat, the breaker or switch on the furnace, and the furnace door, which must be closed for a safety switch to allow operation. If those are fine, the problem may be the control board, a transformer or a safety switch.

Furnace starts but shuts off quickly. Often a dirty flame sensor, a clogged filter causing overheating, or a venting problem tripping the pressure switch.

Blower runs but no heat. Could be a failed igniter, a gas supply problem, a gas valve issue or a tripped limit switch.

Not enough heat. A dirty filter, blocked vents, a failing blower or an undersized furnace.

Noises. Squealing can mean a belt or bearing; rattling can mean loose panels or a failing inducer motor; booming at startup can mean delayed ignition, which should be checked promptly.

Yellow flame or soot. A combustion problem that needs attention, because it can mean incomplete burning and carbon monoxide.

Safety switches and lockouts

Furnaces have several safety switches, including limit switches, rollout switches and pressure switches. When one trips, the furnace may lock out and stop trying to run. Resetting the power may restart it, but if it keeps locking out, the safety switch is doing its job and pointing to an underlying problem. Bypassing a safety switch is dangerous.

Carbon monoxide

Any gas furnace can produce carbon monoxide if something goes wrong. Make sure you have working carbon monoxide detectors on every level of the house and near sleeping areas. If a detector sounds, leave the house and call the gas utility or emergency services.

Repair timing

Furnace problems often appear on the first cold days of the season, when many people turn on their heat at once. Scheduling a tune-up in the fall can catch problems before then and avoid emergency rates.

Questions to ask the technician

Ask what failed, what caused it, whether the part is under warranty and how long the repair itself is guaranteed.

Service plans

Some companies discount repairs for maintenance plan members. Compare the plan cost to what you would save. Ask what is included before you sign up, and whether the discount applies to parts, labor or both.

City	Businesses listed	Avg. Google rating	Total reviews
Houston	464	4.7	72,003
Dallas	121	4.8	26,510
San Antonio	200	4.7	63,399
Austin	108	4.8	39,568
Fort Worth	99	4.7	25,658
El Paso	66	4.5	11,208

Furnace Repair Cost