Typical repair cost

Flame Sensor Cleaning or Replacement Cost (2026)

The flame sensor confirms burners are lit. A dirty sensor is one of the most common causes of short cycling.

National range
$100$300
Part $15$75Labor $25$285
Pricing data updated July 2026· labor 0.5 hrs

Where the money goes

Part $15$75Labor $25$285Typical labor time: 0.5 hrs

You might need this if…

DIY difficulty: easy
Furnace lights then shuts off quickly
Intermittent heat
The part

The flame sensor confirms burners are lit. A dirty sensor is one of the most common causes of short cycling.

Error codes that lead to this repair

This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.