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International Comfort Products GDL100N16A2 Furnace Door Switch
The furnace door switch is a safety switch which stops the vent fan and ignitor from switching on so as to avoid injuries. Do not try to fix it, just have it swapped out ASAP especially if you think it is defective.
Red flags of an unhealthy furnace door switch
- The door switch seems to be wrong
- The furnace does not even thing about starting even when you close the door
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