When to repair
The furnace is under about 15 years old and the fix is a consumable — an igniter, flame sensor, limit switch, or thermostat — coming in under a third of a new furnace's price. Most seasonal calls land here.
Cost guide · Updated July 2026
How much does furnace repair cost?
By the HVAC Service Call editorial team · Part bands single-sourced across our furnace pages
Why a part is printed only once two sources agree, and what happens when they disagree, is explained in our methodology.
Most furnace repairs cost $131–$572, averaging around $300, before any after-hours premium. The service-call fee is $75–$200 and usually credits toward the repair. Exact cost depends on the part — the full table is below.
AVERAGE
~$300, in a $131–$572 range before after-hours.
THE CHEAP FIX
An igniter or flame sensor is $150–$510 — the common seasonal repair.
THE SAFETY ONE
A cracked heat exchanger is an automatic replace, whatever the cost.
01 · At a glance
The numbers, at a glance
Most furnace repairs land between $131 and $572, and the average furnace repair cost sits near $300. The service-call fee is $75–$200 and usually credits toward the repair.
$131–$572Typical range
~$300Average
$75–$200Service call
1.5–2×After-hours
02 · By part
Furnace repair cost by part
Furnace repair costs follow the part that failed more closely than they follow the furnace, the season or the contractor. Parts and labour included, per typical 2026 installed pricing. Consumables like the igniter and flame sensor sit low; the blower, draft inducer, and heat exchanger reach into four figures.
| Part | Installed cost |
|---|---|
| Igniter | $150–$510 |
| Flame sensor | $150–$260 |
| Blower motor | $150–$2,100 |
| Gas valve | $200–$600 |
| Circuit board | $200–$600 |
| Heat exchanger | $100–$1,600 |
| Thermostat | $100–$610 |
| Draft inducer motor | $200–$1,600 |
| Limit / relay switch | $150–$310 |
| Transformer | $100–$180 |
| Burners | $150–$460 |
| Combustion chamber | $100–$620 |
| Flue pipe | $400–$800 |
| Coils (heat pump combo) | $600–$2,100 |
| Filter (DIY) | $10–$50 |
03 · Where the money goes
Anatomy of the bill
A furnace repair bill is more than the part — a trip or diagnostic fee, hourly or flat-rate labour, the part at contractor pricing, and any after-hours premium.
| In the bill | Amount |
|---|---|
| Trip / diagnostic fee (commonly credited, not always) | $75–$200 |
| Labour | $50–$150/hr or flat-rate |
| Part at contractor price | warranty + van stock + overhead |
| After-hours premium, where charged | typically 1.5–2× |
Where the fee sits
The trip or diagnostic fee is commonly credited toward the repair if you approve it on the same visit — commonly, not universally, so ask before the truck is dispatched. The fee mechanics are on service-call cost.
04 · Fuel changes the bill
Gas, electric or oil — what does fuel change?
Fuel decides how many things can fail. An electric furnace has no gas valve, no ignitor, no flame sensor and no heat exchanger, so it has fewer failure points and a lower typical repair — while a gas furnace carries every one of them plus the safety work that comes with combustion. Electric furnace repair cost runs $100 to $380 on a typical incident against $100 to $480 for gas, and both sources below put the gap in the same direction.
| Repair | Gas | Electric | Why |
|---|---|---|---|
| Typical repair | $100–$480 | $100–$380 | HomeGuide 2026, oil priced with gas |
| Average repair band | $200–$600 | $100–$500 | HVAC Pricing Guide 2026 |
| Ignitor / heating element | $150–$400 | $100–$300 | different part, same job |
| Blower motor | $300–$800 | $300–$800 | shared component, same price |
| Annual maintenance | $80–$150 | $50–$100 | combustion checks cost more |
The blower motor is the tell: it is the one major component both systems share, and it costs the same in either — $300 to $800. Every other gap in the table traces back to combustion. That also sets the safety line: work on the gas supply, the burners or the heat exchanger belongs to a licensed technician, because the failure modes there are carbon monoxide and gas leaks rather than a cold house. The warning signs are on furnace carbon monoxide safety.
Electric furnaces are less expensive to repair and more expensive to run — the reverse trade to gas. Which one wins in a given month is an energy-price question, not a repair-cost one, and it is worked through on gas versus electric furnaces.
05 · What moves the number
What makes one furnace repair cost more than another?
The cost of furnace repair is not one number: two identical furnaces on the same street can produce bills a thousand dollars apart. Six things account for nearly all of it, and the first one accounts for most:
- Which part failed
- The single biggest swing. A flame sensor is $80–$250; a heat exchanger is $1,000–$3,000. The same furnace can produce either bill.
- How buried the part is
- A blower in an open basement is an hour. The same blower in a sealed attic closet, reached over ductwork, is three — and labour runs $50–$150 an hour.
- Age and parts availability
- Past about 15 years, components get discontinued. A superseded control board means a universal replacement plus the time to adapt it, or no repair at all.
- Fuel type
- Gas systems carry more failure points than electric ones, and any work on the gas supply, burners or heat exchanger needs a licensed technician.
- When you call
- Nights, weekends and holidays carry a premium where a contractor charges one. Mid-winter is also the busiest and priciest window of the year.
- Warranty status
- Parts are often covered for 10 years if the unit was registered — but labour and the service call are still yours to pay.
Only two of the six are inside your control — when you call, and whether the system was maintained well enough to keep its warranty alive. Those are also the two the next section is about.
06 · When repair stops paying ✓ ✕
Repair or replace?
Age and the one-third rule decide it, with a cracked heat exchanger as the tiebreaker — an automatic replace at any age because it can leak carbon monoxide.
When to replace
The furnace is 20-plus years old, a blower or control board fails at that age, or the heat exchanger is cracked. Efficiency has already dropped and parts get scarce.
Under 15 years, repair; 20-plus, lean replace; cracked exchanger, replace.
The tiebreaker
A cracked heat exchanger is a replace at any age — it is the one failure that can put carbon monoxide into the house. The full framework is on repair or replace, and a new-furnace price on furnace replacement.
Run the one-third rule on your own furnace quote
The rule needs two numbers: your repair quote and what a replacement furnace costs where you live. The second one is the part homeowners rarely have, so the calculator supplies it from the same cost baseline this page's part table is built from, adjusted to your state.
Verdict
Repair
At 16 years a furnace sits between the two defaults, so the one-third threshold breaks the tie.
// a furnace, 16 years old, $1,800 quote
Replacement band ....... $3,800–$9,500
Measured against ....... $6,650
One-third threshold .... $2,217
Repair quote ........... $1,800
By the one-third rule: $1,800 < $2,217 → repair
// At 16 years a furnace sits between the two defaults, so the one-third threshold breaks the tie.
Replacement band ....... $3,800–$9,500
Measured against ....... $6,650
One-third threshold .... $2,217
Repair quote ........... $1,800
By the one-third rule: $1,800 < $2,217 → repair
// At 16 years a furnace sits between the two defaults, so the one-third threshold breaks the tie.
The 50% rule says repair. The $5,000 rule says replace. The three rules disagree, so the age band decides.
Replacement band from our published cost baseline, priced at the national baseline. Pick a state to move it, or enter your own replacement quote to override it.
Want the replacement number this rule needs?
A licensed local contractor can price the replacement so the threshold rests on a real quote: (888) 810-2291.
07 · Paying less, honestly
How do you pay less for a furnace repair?
Not by buying a thinner repair. Five levers change the bill without changing the work, and they are worth knowing before the technician is standing in the basement:
- Get a second quote on anything over $1,000. Furnace repair prices for one fault vary from shop to shop in the same market, and at that size the difference between two contractors is routinely larger than the diagnostic fee you would pay to find out.
- Ask whether the diagnostic fee credits toward the repair — before dispatch, not after. Most shops credit it on a same-visit approval. Some do not, and that is a $75–$200 difference decided by one question.
- Avoid the after-hours premium where the fault can safely wait. No heat in a freeze cannot wait; a noisy blower in October can. Where a contractor charges a premium it typically runs 1.5–2×.
- Book outside the peak. Mid-winter is the busiest and priciest window; the same repair in September or April competes with far less demand.
- Keep the maintenance record. Parts are commonly covered for ten years if the unit was registered and serviced — labour and the call-out are still yours, but a covered part is the largest line on the bill. A heating tune-up is what produces that record.
What none of these means is accepting a cheaper diagnosis. Ask for the repair price in writing before any work starts, and ask for it itemised — part, labour and fee as separate lines. A contractor who will not itemise is telling you something.
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08 · Our numbers
Where our numbers come from
The bands on this page come from published 2026 consumer pricing — HomeGuide, Angi and Forbes Home — and a part is printed only once two named sources agree on its range. Single-source figures do not go on the page. Where the gas and electric columns differ above, that difference is in the source data, not an adjustment we applied; where they are identical, it is because the part is the same part doing the same job.
Those bands are held in one shared file every heating page on this site reads, so the ignitor price here cannot disagree with the ignitor price on a troubleshooting guide or a city page. State-level numbers apply the Bureau of Economic Analysis regional price parity to the national band. Last reviewed in July 2026.
What we do not do: we do not carry out the repair, we do not quote it, and we earn nothing from its size. Your call is routed to a licensed local contractor, and the figure you approve comes from the technician standing at the furnace.
09 · Questions
Common questions
Is it worth repairing a 20-year-old furnace?
Usually not, if the repair is significant. Furnaces last 15–30 years, and by 20 the efficiency has dropped and parts get scarce. A minor fix like an igniter can be worth it; a heat exchanger, blower, or control-board failure at that age generally points to replacement.
Why is a $1,500 furnace repair so expensive for a small part?
The part is only one line of the bill. You're also paying the diagnostic/trip fee, labor at $50–$150 an hour or a flat rate, a warranty-backed part at contractor pricing rather than wholesale, and tax. A cheap component in a hard-to-reach spot, on an after-hours call, adds up fast.
Does home warranty or insurance cover furnace repair?
Homeowners insurance rarely covers wear-and-tear breakdowns — only sudden damage from a covered peril. A home warranty may cover the furnace, subject to a service fee, caps, and maintenance requirements. Read what's actually covered before you count on it.
Is the diagnostic fee credited toward the repair?
At most shops, yes — the $75–$200 service-call fee comes off the bill if you approve the repair on the same visit. It is common, not universal: some contractors credit nothing, and others waive the fee only if you hire them. Ask before the truck is dispatched; the full breakdown is on our service-call cost page.
Is there a weekend or after-hours surcharge?
Usually, but not everywhere — some contractors publish a single rate regardless of the hour, so it is worth asking rather than assuming. Where a premium is charged, nights, weekends and holidays typically run 1.5–2× the standard rate, or add $40–$80 an hour. If the fault can safely wait until a weekday, you avoid it entirely.
How long should a furnace last?
Fifteen to thirty years with maintenance, depending on the fuel type and how hard the winters are. Gas furnaces sit in the middle of that band; electric furnaces often last longer because they have fewer combustion parts.
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