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International Comfort Products PHF036K000A Furnace Door Switch
A furnace door switch is a safety feature that blocks the blower and ignition sequence from turning on so as to stop a potential explosion. It is quite important to have it exchanged for a new one as soon as you can if it is causing you problems.
Clues to watch for in a failing safety furnace door switch
- The furnace does not function with the door closed
- The door switch looks as if it has been bent badly
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