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International Comfort Products NTN6125KJA1 Furnace Door Switch
The furnace door switch is a safety switch which stops the vent fan and gas ignition from turning on so as to stop a potential explosion. You should really have it switched out as soon as possible if it is defective.
Clues to watch for to know the safety door switch will not live much longer
- The furnace door switch looks like it is beat up
- The system will not run whether the door is open or closed
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