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International Comfort Products PGF018K040A Furnace Door Switch
A furnace door switch is a safety feature that stops initial fan and gas ignition from turning on so as to stop a potential explosion. You should really have it traded for new one as quick as you can if you see that it is broken.
Major symptoms of a dying safety door switch
- The door mechanism is messed up
- The system will not even begin to start even with the door closed
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