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
E6Low flame-sensor signalCall a pro soon7 FlashLow flame-sensor signalCall a pro soon34Ignition-proving faultCall a pro soon273Flame-failure recycle lockoutCall a pro soon12Low flame-sensor signalCall a pro soon13Flame was lost during operationCall a pro soon34Ignition-proving faultCall a pro soon8 BlinksFlame-loss recycle lockoutCall a pro soonE6Low flame-sensor signalCall a pro soon12Low flame-sensor signalCall a pro soon13Flame was lost during operationCall a pro soon6 FlashIgnition or flame-sense failureCall a pro soon34Ignition-proving faultCall a pro soon6 FlashIgnition or flame-sense failureCall a pro soon8 BlinksFlame-loss recycle lockoutCall a pro soon8 BlinksFlame-loss recycle lockoutCall a pro soonE6Low flame-sensor signalCall a pro soon7 FlashLow flame-sensor signalCall a pro soon6 FlashIgnition or flame-sense failureCall a pro soon6 FlashIgnition or flame-sense failureCall a pro soon6 FlashIgnition or flame-sense failureCall a pro soon7 BlinksLow flame-sensor signalCall a pro soon7 BlinksLow flame-sensor signalCall a pro soon
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.