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Carrier 58MXA080 Furnace Door Switch
A furnace door switch is a safety feature that stops initial fan and other risky devices from starting so as to stop a potential explosion. You should really have it replaced quickly if you see that it is broken.
Cues of an inadequate safety switch on the furnace door
- The door mechanism appears to be worn
- The furnace will not fire up whether the door is open or closed
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