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Carrier 50JS048300 Furnace Door Switch
A furnace door switch is a safety feature that blocks initial fan and ignition sequence from turning on so as to avoid injuries. It is important to get the part swapped out promptly if it is defective.
Key signs of a worsening safety door switch
- The HVAC system will not run whether the door is open or closed
- The door switch looks as if it has been not there
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