Furnace Repair Cost: $64–$2,673 (Average $318) in 2026
Author: CostGuideHQ Editorial·✓ Fact-checked·Updated July 2026·6 min read·4 sources·US national averages, USD Quick answerQuick answer: Most furnace repairs cost $125 to $650, averaging $318 nationally. A flame sensor or ignitor runs well under $500, while a failing heat exchanger can run $1,000 to $3,000. Fuel type, labor rates, and emergency timing all move the final bill.
- ✓The typical furnace repair costs $125 to $650, averaging $318 nationally, though a full realistic range runs $64 to $2,673 depending on what breaks (Angi, HomeAdvisor, Fixr, HomeGuide).
- ✓Ignitors and flame sensors are the most common — and cheapest — fixes, running $68 to $500 installed (Angi, Fixr, HomeGuide).
- ✓A cracked heat exchanger is the costliest repair, running $100 to $3,000 depending on whether it's patched or replaced (Angi, HomeGuide).
- ✓Once a repair quote nears half the price of a new furnace — especially on a unit pushing 10 years old — replacement usually pays off better (Angi, HomeAdvisor).
How much does furnace repair cost?
National average
$318
per repair
Typical range
$64–$2,673
Most projects
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Cost by material / type
| Type | Low | High |
|---|
| ignitor | $96 | $500 |
| flame sensor | $68 | $250 |
| thermostat | $91 | $600 |
| control/circuit board | $200 | $725 |
| gas valve | $200 | $800 |
| draft inducer motor | $200 | $1,500 |
| blower motor | $150 | $2,000 |
| heat exchanger | $100 | $3,000 |
What affects the cost?
- Which part failed matters more than anything else: a flame sensor or ignitor runs $68-$500, while a heat exchanger repair or replacement runs $100-$3,000 (Angi, Fixr, HomeGuide)
- Fuel type — HomeGuide reports electric-furnace repairs at $100-$380 versus $100-$480 for oil or gas furnaces, since gas components like valves, burners, and flues add complexity
- Labor rate: HVAC technicians bill $50-$150/hour (Angi, HomeAdvisor), $75-$150/hour (HomeGuide), or $87-$162/hour (Fixr), depending on market and company overhead
- Timing — an ignitor swap that runs $150-$250 during business hours can jump to $350-$500 for an emergency after-hours or weekend call (Angi)
- Warranty coverage — most furnace warranties cover parts for 5 to 10 years but not labor, so an in-warranty repair may cost only the diagnostic/service-call fee (HomeGuide)
- OEM vs. generic parts — original manufacturer parts cost more than universal replacement parts for the same repair (HomeGuide)
- Furnace age and system complexity — older units and high-efficiency two-stage systems take longer to diagnose and source parts for, pushing bills toward the high end (HomeGuide, Fixr)
- Repair vs. replace threshold — Angi and HomeAdvisor both describe a '50-percent rule': once a repair quote nears half the cost of a new furnace, especially on a unit pushing 10 years old, replacement is usually the smarter spend
What does furnace repair typically cost?
Most homeowners land between $125 and $650 for a furnace repair, averaging $318 nationally — that’s the figure Angi, HomeAdvisor, and HomeGuide all cluster around within about $18 of each other. Fixr reports a higher average of $485 (range $349-$650), which tracks with its higher quoted labor rate of $87-$162 an hour versus $50-$150 elsewhere. Zoom out to the full realistic spread and the range runs from $64 for a minor fix up to $2,673 for the priciest single-part replacement, a heat exchanger (Fixr). Where you land in that range comes down almost entirely to which part failed and how complex your furnace is — a flame sensor is a quick, cheap fix; a heat exchanger is a major job.
What’s actually broken? Cost by common failure
The failed part drives the bill more than anything else. Ignitors, the single most common failure point, run $96 to $500 to replace (Angi, Fixr, HomeAdvisor); flame sensors run a similarly modest $68 to $250 (Fixr, Angi, HomeGuide). Thermostats land at $91 to $600 depending on whether it’s a basic repair or a smart-thermostat swap. Move up in complexity and cost climbs: a control/circuit board runs $200 to $725, a gas valve $200 to $800, and a draft inducer motor $200 to $1,500. Blower motors span the widest gap, $150 to $2,000, since a simple repair costs little but a full assembly replacement runs into the thousands (HomeGuide cites up to $2,300 for that). At the top of the list, heat exchangers run $100 to $3,000 — HomeGuide’s high end reaches $3,000 and Fixr cites $1,346 to $2,673 specifically for full replacement.
Should you repair or replace the furnace?
Repair almost always costs less upfront, but it isn’t always the better long-term call. Angi and HomeAdvisor both describe a “50-percent rule”: once a repair estimate runs more than half of what a new furnace would cost — and especially if your unit is pushing 10 years old — replacement tends to pay off better, since you’re not gambling that a second part won’t fail next winter. A cracked heat exchanger is the clearest example: at $100 to $3,000 to address (Angi, HomeGuide), and given that a cracked exchanger is a carbon-monoxide safety issue, most technicians will push you toward full replacement rather than a patch job. Warranty status matters too — HomeGuide notes most furnace warranties cover parts for 5 to 10 years but not labor, so check your paperwork before assuming a big-ticket part is free to fix.
How to keep the repair bill down
A few habits keep you toward the low end of the $125-$650 typical range instead of the $2,673 ceiling. Get more than one quote — labor rates alone swing from $50 to $162 an hour across sources (Angi, HomeAdvisor, HomeGuide, Fixr), so a second opinion can save real money on anything beyond a basic part swap. Avoid emergency calls when you can: Angi notes an ignitor job that runs $150 to $250 during business hours can jump to $350 to $500 for an after-hours or weekend visit. Check your warranty before authorizing work, since parts coverage (if not labor) may already be paid for. And keep up with routine maintenance — a clean, well-maintained furnace is less likely to throw an expensive fault like a cracked heat exchanger or seized blower motor in the first place. As Michael, an HVAC contractor with Evans Air Conditioning in Jacksonville, FL, tells Angi: “That’s why it’s crucial to have your unit regularly cleaned and serviced.”
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Frequently asked questions
How much does the average furnace repair cost?+
Most homeowners pay $125 to $650, averaging around $318 nationally (Angi, HomeAdvisor, HomeGuide). Fixr's data runs higher, $349 to $650, which tracks with its higher quoted labor rate and heavier weighting toward big-ticket repairs.
What's the most common — and cheapest — furnace repair?+
Ignitor and flame sensor problems are the most frequent failures. Ignitors run $96 to $500 and flame sensors run $68 to $250 to replace (Angi, Fixr, HomeGuide).
How much does it cost to fix a furnace blower motor?+
Blower motor repairs run $150 to $2,000 depending on whether it's a simple fix or a full assembly swap — HomeGuide puts a full replacement as high as $2,300 (Angi, HomeAdvisor, HomeGuide).
Is it worth repairing a furnace with a cracked heat exchanger?+
Heat exchanger work is the priciest repair on this list, running $100 to $3,000, with Fixr citing $1,346 to $2,673 for a full replacement (Angi, Fixr, HomeGuide). Because a cracked exchanger can leak carbon monoxide, most technicians recommend replacing rather than patching it.
How much do furnace repair technicians charge per hour?+
Labor runs $50 to $150 per hour at Angi and HomeAdvisor, $75 to $150 at HomeGuide, and $87 to $162 at Fixr. Small jobs are often billed at a flat minimum instead of hourly.
Does furnace fuel type affect the repair bill?+
Yes. HomeGuide reports electric furnace repairs at $100 to $380, versus $100 to $480 for gas or oil furnaces, since gas systems carry extra failure-prone parts like valves and flue pipes.
When should I replace my furnace instead of repairing it?+
Angi and HomeAdvisor both point to a '50-percent rule' — once a repair quote runs more than half of what a new furnace would cost, especially on a unit nearing 10 years old, replacement is usually the smarter spend.
Will my home warranty cover the repair?+
Often only partly. HomeGuide notes most furnace warranties cover parts for 5 to 10 years but not labor, so you may still owe a diagnostic and labor charge even on an in-warranty part.
Sources
Figures synthesized and cross-checked across these sources (retrieved 2026-07-28):
- Angi — Furnace repair costs range from $64 to $1,475. Normal range $133-$505, average $318. By part: thermostat $100-$600, blower motor $150-$2,000, draft inducer motor $200-$1,500, ignitor $150-$500 ($350-$500 for emergency/after-hours), flame sensor $150-$250, gas valve $200-$600, circuit board $200-$600, flue pipe $400-$800, relay/high-limit switch $150-$300, transformer $100-$175, oil combustion chambers $100-$600, heat exchanger $100-$1,500, coils $600-$2,000, burners $150-$450, furnace filter $1-$35. Inspection $80-$100, advanced tune-up/cleaning $125-$200.
- HomeAdvisor — Average cost $318; normal range $133-$505; full professional range $64-$1,475. Labor $50-$150/hour. By part: blower motor $150-$2,000, heat exchanger $100-$1,500, gas valve $200-$600, control/circuit board $200-$600, draft inducer motor $200-$1,500, ignitor $150-$500, flame sensor $150-$250, burners $150-$450, flue pipe $400-$800, relay/high-limit switch $150-$300, transformer $100-$175, thermostat $100-$600, coils $600-$2,000, furnace filter $1-$35. The '50-percent rule': if the repair quote is more than half the cost of a new furnace, particularly on a unit pushing 10 years old, replacement is usually the better value.
- Fixr — Average cost of furnace repair services is $349-$650, national average $485; low end $66, high end $2,673. HVAC repair technicians charge $87-$162/hour. By part: ignitor $96-$178, burner $87-$162, heat exchanger $1,346-$2,673, control board $390-$725, limit switch $66-$122, blower motor $562-$1,045, flame sensor $68-$127, thermostat $91-$169. Average cost to clean, replace filters, and service a furnace is $192-$843.
- HomeGuide — Furnace repair costs $125-$480 on average (national average $300, minimum $80, maximum $1,100). Furnace service costs $75-$150 per hour, plus parts. Oil or gas furnace repairs cost $100-$480; electric furnace repairs cost $100-$380. By part: fan blower motor $300-$900 (full assembly replacement $500-$2,300), blower motor capacitor $100-$250, heat exchanger $1,000-$3,000, gas valve $200-$800, circuit/control board $300-$650, transformer $100-$250, thermocouple $100-$300, flue pipe $300-$700, chimney liner $900-$3,800, short-cycling repair $100-$400, draft inducer motor $400-$1,100, ignitor $100-$250, condenser/evaporator coil $650-$4,200, combustion chamber $200-$600, flame sensor $80-$250, heating element per coil $125-$400, limit switch $100-$375, fan-relay switch $100-$300, thermostat $190-$480. Most furnace warranties cover parts for 5-10 years but not labor.
Angi and HomeAdvisor (sister brands under the same parent company) report identical topline figures — average $318, normal range $133-$505, full range $64-$1,475 — so they're treated as one corroborating data point rather than two independent ones. HomeGuide lands close behind with a $300 national average and $125-$480 typical range. Fixr reports a notably higher national average ($485, range $349-$650) and the highest ceiling of any source ($2,673 for a heat exchanger), which tracks with its higher quoted labor rate ($87-$162/hour vs. $50-$150 elsewhere) and heavier weighting toward big-ticket repairs. national_average_usd (318) is anchored to the Angi/HomeAdvisor/HomeGuide cluster, which three separate estimator methodologies agree on within about $18. range_low_usd (64) and range_high_usd (2,673) mark the full realistic spread cited across all four sources, from a simple part swap to a heat-exchanger-level repair (Fixr's ceiling). project_low_usd/project_high_usd (125-650) represent the tighter band most homeowners actually see, combining HomeGuide's average range floor with Fixr's typical range ceiling. by_type figures per part are synthesized as the low across all citing sources to the high across all citing sources, since methodologies differ enough (Fixr and HomeGuide both quote materially higher part-level costs than Angi/HomeAdvisor) that no single source's number should stand alone as the range.