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International Comfort Products H8MPT125J20B1 Furnace Door Switch
A furnace door switch is a safety feature that blocks the vent fan and gas ignition from switching on so as to stop a potential explosion. You should have the switch be substituted for a new part at once if you suspect that it is not working.
Warnings the safety door switch is in dire straights
- The furnace does not fire up even when you close the door
- The safety door switch appears as though it has been worn down
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