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International Comfort Products C9MPD075F12A1 Furnace Door Switch
The furnace door switch stops initial fan and gas ignition from activating in order to prevent injury and fire. Do not try to fix it, just have it substituted for a new part as soon as you can if you suspect that it is not working.
Major red flags your furnace door switch is not going to last much longer
- The safety door switch looks like it is broken
- The system will not run with the door closed
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