Cleaning a furnace flame sensor.
January 19, 2014 8:47 AM Subscribe
My furnace is cycling on and off continuously. I'm pretty sure I know why and think I can handle the repair (cleaning the flame sensor), but I want to be sure I'm doing it properly.
posted by davebush to Home & Garden (8 answers total) 1 user marked this as a favorite
I've got a Goodman gas furnace that's approx a year and a half old. It recently began a process of firing up, then immediately the burners shut off. It does this steady. Based on online research, I'm 98% certain it's caused by a dirty flame sensor. Here's my plan:
1. Shut the power to the furnace.
2. Open it, locate the flame sensor, dismount it and clean it.
3. Close the furnace up, put the power back on and hope I've solved the problem.
One thing I'm a bit worried about is the gas - is it necessary to shut it off beforehand, then open it after the repair? Online guides aren't mentioning this. I'm concerned that shutting the gas off will cause a further problem and I'd rather not shut it off.
Is my plan correct?