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International Comfort Products GPCM36K100F Furnace Door Switch
The furnace door switch is a safety switch which inhibits initial fan and gas ignition from switching on so as to stop a potential explosion. You should really have it substituted for a new part ASAP if you find it to be faulty.
Cues of a barely functioning safety switch on the furnace door
- The door mechanism looks like it is bent badly
- The HVAC system will not run with the door closed
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