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International Comfort Products GPFM48H120F Furnace Door Switch
The furnace door switch is a safety switch which stops the vent fan and other risky devices from switching on so as to stop a potential explosion. Do not try to fix it, just have it exchanged for a new one at once if it is defective in some way or another.
Hints of a weak furnace door switch
- The whole system will not start whether the door is open or closed
- The door mechanism looks broken completely
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