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International Comfort Products NBF075B12A1 Furnace Door Switch
A furnace door switch is a safety feature that prevents the vent fan and gas ignition being triggered to start in order to prevent injury and fire. You should have the switch be switched out immediately if you can, if it is defective in some way or another.
What are the signs that the switch on the furnace door has to be replaced?
- The door mechanism has been beat up
- The system cannot run even when you close the door
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