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International Comfort Products H9MPT125L20B1 Furnace Door Switch
A furnace door switch is a switch that inhibits the blower and other risky devices from starting so as to stop a potential explosion. It is extremely important that the device is replaced immediately if you can, if you find it to be faulty.
Major signs of a laboring safety door switch
- The door mechanism looks worn down
- The furnace will not fire up even when you close the door
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