I have a all-pro pk115tforced air heater that starts up and runs for 20 minutes than shuts off when reset it starts up but stops in a few seconds
A cad cell is a photo-electric device that reads the UV rays given off by flame after it has ignited. If it does not 'see' the flame, due to a flame failure OR a cad cell failure, the control circuit is locked out.
Make sure there is no carbon on the front (window)of the cell and make sure its adjustment is in perfect alignment to the flame.
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