2026 cost guide
Furnace repair cost in 2026
By the HeatAndAirCost editors · Last updated September 1, 2026 · How we research prices
Short answer
Furnace repair costs $125 to $480 on average in 2026, with a national average around $350[1]. Simple fixes like a flame sensor or thermostat sit at the low end; a blower motor, control board, or heat exchanger can run $600 to $2,000 or more. Expect a $75 to $200 service call or diagnostic fee, plus $75 to $150 an hour for labor[2].
Furnace repair cost by part
These are researched 2026 ranges, not quotes. What you pay depends on your furnace, the part, and your local labor rate.
| Repair | Typical 2026 range | Notes |
|---|---|---|
| Flame sensor cleaning or replacement | $80–$250 | One of the most common no-heat causes. |
| Thermostat replacement | $115–$300 | Smart thermostats sit at the top of the range. |
| Igniter (hot surface) replacement | $150–$400 | A frequent cause of a furnace that clicks but won't light. |
| Capacitor replacement | $120–$300 | Small part, quick job. |
| Blower motor replacement | $400–$1,500 | Wide range by motor type (PSC vs ECM). |
| Control / circuit board | $300–$700 | Diagnosis matters; boards are often misdiagnosed. |
| Gas valve replacement | $300–$800 | Gas work is a licensed-pro job. |
| Heat exchanger replacement | $1,000–$2,000+ | A cracked heat exchanger is often a replace-the-furnace decision. |
What moves the price
- The failed part. A flame sensor or capacitor is inexpensive; a blower motor or gas valve is not[1].
- Emergency or after-hours. Nights, weekends, and same-day no-heat calls carry premium labor rates.
- Your furnace type. High-efficiency, oil, and modulating furnaces have pricier parts than a basic single-stage gas unit.
- Diagnosis time. Intermittent faults take longer to find, and labor is billed by the hour.
- Age and warranty. Parts still under manufacturer warranty cut the bill to labor only.
Repair or replace?
If the repair is expensive and the furnace is old, do the math before you spend. Our $5,000 rule guide shows exactly how to decide, and our furnace replacement cost page covers the alternative.
Before you pay: try the free checks
A furnace that won't run isn't always a repair. Before you book a visit, work through the no-tool checks on our furnace not turning on and furnace blowing cold air guides. A tripped switch, a dead thermostat battery, or a clogged filter can look like a breakdown.
People also ask
Furnace repair FAQs
What is the most expensive repair on a furnace?
The heat exchanger is typically the most expensive furnace repair, often $1,000 to $2,000 or more. Because a cracked heat exchanger is both costly and a carbon-monoxide safety concern, many homeowners weigh it against replacing the whole furnace, especially on an older unit.
What are the most common furnace repairs?
The most common furnace repairs are a dirty or failed flame sensor, a worn hot-surface igniter, a bad capacitor, thermostat problems, and blower-motor issues. Flame sensor and igniter faults are frequent causes of a furnace that runs but won't produce heat.
How much is a furnace service call?
Most HVAC companies charge $75 to $200 for a service call or diagnostic fee, which usually covers coming out and identifying the problem. Some apply that fee toward the repair if you go ahead with the work. After-hours and emergency visits cost more.
What is the $5,000 rule for HVAC?
Multiply your system's age in years by the repair quote. If the result is over $5,000, replacing usually makes more sense than repairing; under $5,000, repair. A $400 repair on a 10-year-old furnace scores 4,000 (repair); the same repair on a 15-year-old furnace scores 6,000 (lean toward replacement). See our full $5,000 rule breakdown.
Got a quote?
See if it's a fair price
Compare your quote against the ranges above, then get free quotes from independent, licensed HVAC contractors when you're ready.