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International Comfort Products NDN5100BFC2 Furnace Door Switch
A furnace door switch is a safety feature that prevents the draft inducer and ignition sequence from switching on in order to prevent injury and fire. You should have the switch be switched out immediately if you can, especially if you suspect it is not working properly.
Simple signals your furnace door switch will die soon
- The HVAC system does not operate with the door closed
- The door switch appears to be eroded
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