Furnace repairs range from simple ignition and sensor issues to expensive blower, control-board and heat-exchanger problems. System age matters as much as the repair price.
What furnace repair usually costs
A diagnostic visit is commonly followed by a parts-and-labor quote. Ignition, flame-sensor and thermostat work often stays in the lower price bands. Blower, control-board and major combustion-side repairs can cost much more.
Common furnace repair price ranges
| Repair | Planning range |
|---|---|
| Flame sensor / cleaning | $100–$300 |
| Igniter | $150–$450 |
| Thermostat / control issue | $150–$500 |
| Blower motor | $450–$1,300 |
| Control board | $400–$1,100 |
| Heat exchanger / major repair | $1,000–$3,500+ |
Safety changes the decision
Combustion or carbon-monoxide concerns are not a “wait and see” repair. If a technician identifies a cracked heat exchanger, venting problem or unsafe combustion condition, stop using the equipment until a qualified professional confirms it is safe.
Repair vs. replace
A 15–20 year old furnace with a major failure deserves a replacement comparison. For a younger furnace with a modest repair and otherwise good condition, repair is often the more economical choice.
Estimate your cost
Use the calculator below for a state-adjusted planning range. Your contractor still needs to diagnose, size or inspect the actual system before giving a firm quote.
Want to compare this estimate with local HVAC help?
Call to connect with service options in your area. Ask for a written quote before authorizing major work.