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International Comfort Products N9MP1100F14C2 Furnace Door Switch
The furnace door switch is a safety switch which stops the vent fan and ignitor from turning on so as to stop a potential explosion. Do not waste time and have it traded for new one as soon as possible if it is defective in some way or another.
Subtle cues to watch for in a failing safety furnace door switch
- The switch seems to be worn
- The system will not even begin to start even when you close the door
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