Furnace Repair Cost Calculator
Estimate your furnace repair cost based on the type of repair, your location, and timing.
Furnace Repair Cost Calculator
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How Furnace Repair Costs Are Calculated
Furnace repair costs depend on three main factors: the type of repair, your location, and the timing of service. Our calculator uses real pricing data from thousands of HVAC service calls across all 50 states to generate your estimate.
Repair type is the biggest variable. A simple flame sensor cleaning costs $75–$200, while a heat exchanger replacement runs $500–$3,500. The difference comes down to parts cost and labor time — a flame sensor takes 15 minutes, while a heat exchanger takes 6–10 hours.
Location affects labor rates. HVAC technicians in New York average $125–$150/hour, while those in Mississippi charge $60–$85/hour. Our calculator adjusts for these regional differences using Bureau of Labor Statistics wage data and cost-of-living indices.
Timing adds surcharges. Emergency and after-hours service costs 50–200% more than standard business-hour rates. If your situation isn't a safety emergency, scheduling a same-day appointment during business hours can save hundreds.
For a detailed breakdown of what each component costs to repair, see our cost by repair type guide. If you're wondering whether to repair or replace, try the repair vs. replace calculator or read about the $5,000 rule.
Frequently Asked Questions
How much does a furnace repair cost on average?
Most furnace repairs cost between $150 and $600, including the diagnostic fee. Simple fixes like replacing a flame sensor or capacitor are on the lower end ($75–$250), while major repairs like a heat exchanger can run $500–$1,500.
What is a furnace diagnostic fee?
A diagnostic fee (also called a service call fee) is what the technician charges to come to your home and identify the problem. This typically ranges from $75 to $150 and is usually credited toward the repair if you hire them.
Does emergency furnace repair cost more?
Yes. Emergency and same-day furnace repairs typically cost 50% more than standard service. After-hours service (evenings, weekends, holidays) adds about 25% more. If it's not an emergency, scheduling a regular appointment can save you hundreds.
Why does location affect furnace repair cost?
Labor rates and cost of living vary significantly by state. For example, furnace repairs in California or Hawaii cost 30–40% more than in Mississippi or West Virginia. Our calculator adjusts for these regional differences.
What is the most expensive furnace repair?
A cracked heat exchanger is the most expensive furnace repair, typically costing $500–$1,500 for parts and labor. Because of the high cost, a heat exchanger replacement on an older furnace often makes replacement the better financial choice.
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