Furnace repair costs: 2026 price guide
Most homeowners pay $150 to $900 for a furnace repair, with a national average around $350–$400. The final bill depends heavily on which component failed and whether it’s an after-hours call.
Furnace repair cost depends on more than a single failed part. The type of furnace (gas, electric, or oil), the age of the system, which component failed, local labor rates, and even airflow conditions inside the duct system all factor into the final bill. A furnace repair cost estimate that only quotes “$300” without naming a part is worth double-checking.
This guide breaks down average furnace repair prices by component, what a fair invoice looks like, and when a repair bill signals it’s time to consider furnace replacement instead. If you’re comparing quotes for a furnace repair near you, use the tables below as a sanity check before approving any invoice over a few hundred dollars.
By component
Common furnace repairs & costs
Match your symptom to the part that’s likely failing, and the cost range to expect.
| Component / issue | Symptom | Estimated cost |
|---|---|---|
| Flame sensor / thermostat | Furnace won’t stay lit or won’t turn on | $100–$250 |
| Igniter replacement | Clicking sound, no flame ignition | $150–$400 |
| Blower motor | Weak airflow or no air movement | $400–$900 |
| Control board | Erratic cycling, error codes | $600–$1,500 |
| Cracked heat exchanger | $1,000–$3,000 |
Why this is a safety issue, not just a repair decision
A furnace’s heat exchanger separates combustion gases — including carbon monoxide — from the air that circulates through your home. When it cracks, CO can leak directly into your living space undetected; it’s colorless and odorless. That’s why reputable technicians shut a furnace down immediately on discovering a crack, rather than leaving it running until a repair is scheduled.
What to do: turn off the furnace, ventilate the home, and if a working CO detector is alarming, evacuate and call emergency services before calling a repair company. Most heat exchangers aren’t repaired — because of the safety risk and labor involved in accessing them, replacing the furnace (or in rare cases just the exchanger under warranty) is the near-universal outcome.
What’s on the invoice
What a typical bill breaks down to
A furnace repair invoice is rarely just “the part.” Here’s what usually shows up on a reasonable quote.
- Service call / diagnostic fee: $80–$200
- Labor, billed hourly or flat-rate: $50–$150/hr
- Parts, ranging from modest to significant
- After-hours surcharge, if applicable
Emergency service
After-hours & winter emergency calls
Emergency furnace repairs — nights, weekends, or the coldest week of the year — typically run $300 to $1,200, with hourly labor rates climbing to $150–$215.
If your furnace quits during a cold snap, ask upfront whether the after-hours fee is flat or hourly before the technician starts work.
Decision framework
When repair stops making sense
Furnaces typically last 15 to 30 years. A common benchmark: if repair costs exceed roughly a third to half of replacement cost on a unit older than 15 years, replacement is usually the better financial call. New furnace installation runs $4,000–$10,000 depending on type and ductwork.
Repair is usually fine if:
- • System is under 10–12 years old.
- • Repair cost is under $600.
- • This is the first repair call this year.
Replacement is worth considering if:
- • Heat exchanger is cracked (safety risk).
- • System is 15+ years old.
- • Repair cost exceeds ~40–50% of a new unit.
Common questions
Frequently asked questions
Averages blend simple fixes (a $120 flame sensor cleaning) with major component failures ($900 blower motor). If your quote is high, ask which specific part failed and why — a fair technician can point to it on the unit.
Often, yes — most home warranty plans cover furnace repairs subject to a service call fee ($75–$125) and coverage caps. Check your policy for exclusions on pre-existing wear or lack of maintenance records.
Most single-component repairs (igniter, flame sensor, capacitor) take 30–90 minutes once diagnosed. Blower motor or control board replacements typically run 2–4 hours.
Yes, safely: check the thermostat batteries and settings, confirm the furnace’s power switch and breaker are on, and replace a dirty air filter. Don’t attempt anything involving the gas line, ignition system, or interior panels — that’s technician territory.
A faint dusty smell in the first few minutes of the heating season is usually just dust burning off the heat exchanger — normal. A persistent or strong burning smell, especially combined with headaches or nausea, could indicate a cracked heat exchanger and warrants immediate attention (see the callout above).
Anything involving gas lines, electrical components, or the combustion chamber legally requires a licensed HVAC technician in most jurisdictions. Filter changes and thermostat swaps are the exception.
A tune-up typically runs $75–$200 and catches worn parts (cracked capacitors, dirty flame sensors, loose electrical connections) before they cause a mid-winter breakdown. It’s one of the better-value preventive spends in home maintenance.
Yes. Gas furnaces have more components that can fail (igniters, burners, heat exchangers, gas valves) and generally cost more to repair than electric furnaces, which have simpler heating elements but can still have expensive blower motor or control board failures.
Need a furnace estimate?
Connect with a licensed HVAC technician to diagnose the issue and get a realistic price before you commit.