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International Comfort Products NTC7075BFA3 Furnace Door Switch
The furnace door switch is a safety switch which inhibits the blower and ignition sequence from starting in order to prevent injury and fire. You should have the switch be changed as quick as you can if it is defective.
Major symptoms of a deteriorating safety switch on the furnace door
- The furnace door switch appears to be broken badly
- The whole system does not fire up even with the door closed
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