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International Comfort Products T8DNL075B12A1 Furnace Door Switch
The furnace door switch is a safety switch which blocks the vent fan and ignitor being triggered to start in order to prevent injury and fire. It is important to get the part switched out as soon as you can especially if you suspect it is not working properly.
Some clues of a failing safety furnace door switch
- The switch seems breaking apart
- The furnace does not begin to work whether the door is open or closed
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