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Carrier 58MXB080F10120 Furnace Door Switch
The furnace door switch is a safety switch which blocks the fan and other risky devices being triggered to start so as to stop a potential explosion. You should have the switch be switched out ASAP if it is defective.
Major signs your safety switch on the furnace door should be replaced
- The furnace will not even begin to start whether the door is off or on
- The door switch seems fallen off
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