Furnace Repair or Replace? What It Costs and How to Decide

Typical 2026 price ranges and the rules of thumb pros use. Call for a real price for your home.

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Typical costs

Typical national ranges (not a quote)
Item	Typical cost
Service call / diagnostic fee	about $75 – $200 (sometimes credited toward the repair)
Typical furnace repair	about $130 – $500 (average around $320)
New gas furnace, installed	about $2,800 – $6,900 (average around $4,800)
Oil or propane furnace, installed	often $4,500 – $8,000+

Compiled from 2026 consumer cost guides (HomeAdvisor, Angi via NerdWallet). Your price depends on your home and provider.

Age: most furnaces last about 15 to 20 years. Past 15, big repairs are harder to justify.
The 30–40% rule: if a repair costs more than about a third of a new system, replacement often makes more sense.
The $5,000 rule: repair cost × age in years. Over $5,000 usually points to replacing.
Repeated breakdowns in the last two years, uneven heating or rising energy bills favor replacing.
A cracked heat exchanger is a safety issue; most pros will recommend replacement.

Want a real price instead of a range? Talk to a local HVAC pro.

What exactly failed, and what does the repair cost in writing?
How old is my furnace and what's its expected remaining life?
If I replace it, what size and efficiency do you recommend, and why?
Are there rebates or tax credits for a high-efficiency furnace or heat pump in my area?

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