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International Comfort Products TCA042AKA1 Furnace Door Switch
The furnace door switch is a safety switch which blocks the vent fan and ignitor from starting in order to prevent injury and fire. It is imperative that the switch be changed as soon as you can especially if you suspect it is not working properly.
Signs of a faulty furnace door switch
- The furnace door switch looks worn
- The furnace does not fire up whether the door is off or on
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