Did you check the furnace s filters.
Clean flame sensor lennox gas furnace.
Anything else we should know to help you best.
I noticed that the flame would come on then go out after a few minutes then light then go out after another 3 4 minutes.
Once you have removed the sensor gently rub the metal rod only with soft steel wool or soft scotch brie type pad never use sandpaper as it will damage the flame rod.
After 3 tries the.
As long as the component senses the flame it sends a message to the main furnace control board telling it to keep the main burner on and the gas valve open.
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My furnace was shutting down after a a few minutes.
Cleaning the flame sensor with sandpaper can make it more difficult for the component to successfully sense the flame.
Konduone 52w29 flame sensor replacement for lennox furnace flame sensor replaces 52w2901 lb 74940a 31l71 31l7101 fits for g40 g41 g50 g51 g60 g61 g71 3 4 out of 5 stars 13 7 99 7 99 9 99 9 99 get it as soon as tue may 12.
Lennox gas furnaces contain an important safety component known as a flame sensor.
Remember you are not sanding down an auto body but simply ridding the sensor of any build up it may have.