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International Comfort Products NDN3100KFA1 Furnace Door Switch
The furnace door switch is a safety switch which blocks the draft inducer and burner from switching on in order to prevent injury and fire. Do not try to fix it, just have it changed quickly if you see that it is broken.
Major warnings your safety switch on the furnace door will not last the year
- The door mechanism is worn
- The HVAC system cannot run even with the door closed
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