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Lennox 14ACX-048 Furnace Door Switch
The furnace door switch is a safety switch which prevents initial fan and ignitor from switching on in order to prevent injury and fire. You should really have it traded for new one quickly if it is causing you problems.
Key clues of an unhealthy safety furnace door switch
- The system does not turn on even when you close the door
- The safety door switch has been broken
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