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Carrier 58MXA040F14108 Furnace Door Switch
This switch stops the blower and other risky devices from switching on so as to avoid injuries. You should really have it traded for new one as soon as you can especially if you think it is defective.
Important red flags of an ailing safety furnace door switch
- The door switch looks like it is stuck
- The furnace does not even thing about starting even with the door closed
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