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International Comfort Products NTPM075GFA1 Furnace Door Switch
The job of the furnace door switch blocks the vent fan and ignitor from starting so as to stop a potential explosion. Do not try to fix it, just have it exchanged for a new one ASAP especially if you suspect it is not working properly.
Major indications to watch for in a failing safety furnace door switch
- The switch looks bent badly
- The furnace will not start even when you close the door
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