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International Comfort Products H9MPD050F12A1 Furnace Door Switch
A furnace door switch is a safety feature that prevents the draft inducer and ignition sequence being triggered to start in order to prevent injury and fire. It is extremely important that the device is substituted for a new part as quick as you can if it is not working in order to prevent injuries.
Some clues of a poorly working safety door switch
- The door mechanism appears as though it has been broken completely
- The HVAC system cannot run whether the door is open or closed
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