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Mitsubishi MUY-GE18NA Furnace Door Switch
The job of the furnace door switch stops the vent fan and ignitor being triggered to start in order to prevent injury and fire. It is extremely important that the device is swapped out promptly if you see that it is broken.
Some clues of an ineffective safety furnace door switch
- The door mechanism looks not there
- The system does not function even with the door closed
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