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International Comfort Products MF08B1500A1 Furnace Door Switch
The furnace door switch is a safety switch which blocks the vent fan and ignition sequence from activating in order to prevent injury and fire. It is vital that this part be traded for new one promptly if you find it to be faulty.
General warnings of a faulty safety switch on the furnace door
- The system does not fire up whether the door is open or closed
- The furnace door switch looks like it is messed up
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