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Carrier 50JZ030310 Furnace Door Switch
The job of the furnace door switch blocks initial fan and ignition sequence being triggered to start so as to avoid injuries. You should have the switch be replaced immediately if you can, especially if you think it is defective.
Key symptoms to watch for in a bad safety furnace door switch
- The furnace does not turn on with the door closed
- The safety door switch looks stuck
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