Furnace Repair Cost Guide 2026
What to expect to pay, what drives costs up or down, and how to get an accurate estimate.
Typical cost
$100 – $600per repair
Diagnostic fee: $75–$150. Ignitor replacement: $100–$250. Flame sensor: $75–$200. Blower motor: $300–$600. Heat exchanger: $500–$1,500 (often warrants replacement).
What affects furnace repair cost
Diagnostic fee: $75–$150. Ignitor replacement: $100–$250. Flame sensor: $75–$200. Blower motor: $300–$600. Heat exchanger: $500–$1,500 (often warrants replacement).
About furnace repair projects
Furnace repair technicians diagnose and fix heating system failures including ignitor problems, flame sensor issues, blower motor failures, thermocouple malfunctions, and cracked heat exchangers. A furnace that fails during a cold snap is an emergency — pipes can freeze, and interior temperatures can become dangerous within hours. The most common furnace repairs are ignitor and flame sensor replacement (inexpensive parts that fail regularly) and blower motor issues. A cracked heat exchanger is a serious safety concern because it can allow carbon monoxide to enter the living space — if diagnosed, replacement of the furnace is typically recommended over repair. Annual fall tune-ups catch these issues before the heating season begins.
How to keep furnace repair costs in check
- ✓Ask about emergency/same-day availability during the heating season.
- ✓Confirm the diagnostic fee and whether it's credited toward the repair.
- ✓Ask for a carbon monoxide safety check as part of any furnace service call.
- ✓Get a written repair-vs.-replace assessment for furnaces over 15 years old.
Cost FAQ
What is the average cost of furnace repair work?
The average cost ranges from $100 to $600 per repair. Diagnostic fee: $75–$150. Ignitor replacement: $100–$250. Flame sensor: $75–$200. Blower motor: $300–$600. Heat exchanger: $500–$1,500 (often warrants replacement).
Why do contractor estimates vary so much?
Material quality, project complexity, local labor rates, and contractor overhead all affect pricing. A 30–50% variance between bids on the same project usually means different scopes — get line-item estimates and compare carefully.
How can I lower the cost without sacrificing quality?
Schedule during off-peak times (spring and fall are busiest for most trades). Get 3+ competing bids. Avoid making scope changes after work starts. Supply your own materials if you can find better pricing (discuss with contractor first).
Does homeowner's insurance cover this work?
Typically only if the damage is sudden and accidental (storm, fire, burst pipe). Routine maintenance, wear and tear, and improvements are not covered. Check your policy for specifics.
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