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International Comfort Products H8MPN050B12A1 Furnace Door Switch
The job of the furnace door switch stops the vent fan and ignition sequence from starting so as to avoid injuries. You should really have it substituted for a new part promptly if it is defective in some way or another.
General warnings of a declining safety switch on the furnace door
- The furnace door switch appears to be worn
- The HVAC system will not run even when you close the door
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