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SPT WA-1010M Furnace Door Switch
The furnace door switch is a safety switch which blocks the vent fan and other risky devices from activating in order to prevent injury and fire. It is imperative that the switch be changed as quick as you can especially if you think it is defective.
Major warnings of a defective safety door switch
- The switch looks like it is stuck
- The HVAC system will not fire up whether the door is open or closed
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