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Carrier 48XZ030040300 Furnace Door Switch
The furnace door switch is a safety switch which stops initial fan and other risky devices from activating so as to stop a potential explosion. It is extremely important that the device is replaced ASAP if it is defective.
Key signs of a dying furnace door switch
- The door switch appears as though it has been bent
- The HVAC system does not function even when you close the door
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