FLAME SENSOR CLEANING

Flame sensors can become dirty and cause short cycling issues. At the time of the video I in fact had issues with short cycling. Cleaning the flame sensor is always a fast and easy first troubleshooting step. If you aren’t confident in yourself call a furnace technician. If your furnace has a code light flashing, check your manual and see what the code means.

For this job I am using a 1/4 inch socket, Scotch brite, Vinyl Gloves, and some paper towel
The sensor is the green metal piece in the path of the burner flame
A furnace is an electric appliance even if it is natural gas or propane. TURN OFF THE POWER TO THE FURNACE BEFORE TOUCHING
In my furnace the sensor is held in by one screw and pulls straight back
Note the carbon build up. Remove the electrical connection
Don't touch you sensor with bare hands. remove carbon with pad or steel wool (follow furnace manual for your unit)
Attach electrical connector back onto the sensor
Install sensor back into the furnace. Ensure it is in the original position from when it was removed.
Note that the ingniter has two wires going to it on the right side of the picture. also it is between burners not out in front of them
Turn the furnace back on
Note the ignitor heating up
Burners should turn on and stay on. Notice the flame sensor in the path of the jet of fire
If all is well put the covers/doors back on your furnace

Tools and equipment used:

Scotch Brite Pads – https://amzn.to/3rrsfdC
Socket Set –https://amzn.to/33HDRAV
Gloves – https://amzn.to/3fxte6u

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