Furnace Repair Cost: 2026 Prices by Problem

Most homeowners call a furnace repair cost tech expecting a $100 fix and walk away having spent considerably more. The national average lands at $318 in 2026, with individual jobs ranging from $64 to $1,475.

Blower motors and gas valves tend to sit toward the upper end of that range, and the final number shifts quite a bit depending on which part failed, what type of furnace you have, and where you live.

Average Furnace Repair Cost in 2026

Simple fixes on an electric furnace can run as low as $133, while a bigger job on a gas furnace climbs to $505 or more. The same goes for heater repair cost in general: the part and fuel type drive the number more than anything else.

Location moves the number more than people expect. Los Angeles homeowners average $490, typically between $179 and $802, while Houston repairs average $323, usually landing between $117 and $572.

Furnace Repair Cost by Part

Here's what you'll pay to repair furnace components based on which one failed. These are national averages, so get a written quote before assuming yours should match exactly.

Furnace Part	Typical 2026 Cost
Ignitor	$150-$500
Flame sensor / thermocouple	$150-$250
Blower motor	$150-$2,000
Control board	$200-$600
Gas valve	$200-$600
Relay / high-limit switch	$150-$300
Heat exchanger (repair)	$100-$200
Heat exchanger (full replacement)	$1,250-$3,000
Inducer motor	$200-$1,500
Thermostat	$100-$300

The ignitor fails more often than any other part in a gas furnace, typically running $150 to $250 during normal hours. Blower and inducer motors cost more because both sit deep in the cabinet and often need partial disassembly to reach.

Gas vs. Electric Furnace Repair Costs

Electric furnaces are simpler machines with no gas valve, ignitor, flue pipe, or combustion chamber. Fewer parts means fewer things that break, and repairs generally run cheaper than on gas systems, since gas furnaces need certified handling of fuel lines and venting.

Gas furnace repair cost tends to run higher across the board for that reason. If your electric furnace is acting up, the fix is more likely a blower motor or control board, not the gas-specific parts driving costs elsewhere on this list.

Diagnostic Fees and Emergency Rates

Expect to pay $100 to $250 just for a technician to show up and diagnose the problem. Some companies roll that into the repair if you hire them on the spot; others charge it regardless. Ask before they start.

Standard HVAC repair labor runs $50 to $150 per hour, but after-hours calls are a different story. Emergency and weekend rates typically run 50% to 100% higher than standard, and during peak winter demand, rush service can push that even further. If your furnace dies at 11 p.m. and nobody is in danger of hypothermia, it is often cheaper to wait until morning.

Repair vs. Replace: The Age Rule and the 50% Rule

The age rule: EPA and DOE guidance points to 15 years as the age where it's worth considering a more efficient replacement. Furnaces that old often run at 80% efficiency or worse, showing up as a higher gas bill every month on top of any repair cost.

The 50% rule: If the repair estimate is anywhere near half the cost of a new system, replace instead of repair. Furnace replacement averages $4,814, with a typical range of $2,823 to $6,897. On a $4,500 furnace, a $2,200 repair bill sits right at the edge, and that's worth a second, independent quote before committing either way.

A 17-year-old furnace with a $1,000 blower motor quote isn't just an expensive repair. It's a costly fix on a system already near the end of its expected life.

The Heat Exchanger Exception

Every other repair on this page is a judgment call. A cracked heat exchanger isn't.

The heat exchanger separates your home's air supply from combustion gases. When it cracks, carbon monoxide can leak into the air your furnace is circulating through the house, a documented hazard behind multiple federal recalls. A cracked heat exchanger is a serious safety issue. Shut the furnace down and have a qualified HVAC professional determine whether the exchanger or the whole furnace needs replacing.

Full replacement averages $1,750, with most jobs falling between $1,250 and $3,000, and that range climbs with high-efficiency dual-exchanger furnaces. On a furnace old enough for this to be a live question, run the 50% rule before deciding.

What a Home Warranty Actually Covers

Home warranties vary by company, so read the actual contract, not the sales page. Most charge a service fee of $75 to $100 per claim, on top of the annual premium, and cap how much they'll pay per repair.

Common exclusions include pre-existing conditions, mismatched systems, and anything still under a manufacturer's own warranty. If your furnace is fairly new, check that coverage first. The two rarely stack.

FAQs

How much does furnace repair cost?
The national average furnace repair cost is $318, with individual repairs ranging from $64 to $1,475 depending on the part and problem. Major parts like blower motors or heat exchangers can push the bill past $1,000.

What's the most expensive furnace repair?
A full heat exchanger replacement, which can run $1,250 to $3,000. Blower motor replacement is the next biggest, at up to $2,000.

Is furnace troubleshooting something I can do myself?
Checking the filter, thermostat batteries, and breaker is safe DIY furnace troubleshooting. Anything involving gas, the flue, or the control board should go to a licensed tech.

What does emergency furnace repair cost?
Expect a real premium. HVAC repair rates run 50% to 100% above standard on evenings and weekends, and peak winter demand can push that further.

Does a furnace warranty cover labor?
Usually not. Manufacturer warranties typically cover the part; labor is billed separately unless you've paid for an extended plan.

Is a $1,000 furnace repair worth it?
On a furnace under 10 years old, usually yes. On one over 15 years old, get a replacement quote first and run the 50% rule. The math on heater repair cost versus replacement gets clearer once you know what a new system would run.