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Carrier 38SYG042 Furnace Door Switch
The furnace door switch is a safety switch which prevents initial fan and burner being triggered to start in order to prevent injury and fire. You must have the device replaced as soon as possible if it is defective in some way or another.
Major indications of a defective switch on the furnace door
- The safety door switch is broken badly
- The whole system does not even thing about starting whether the door is open or closed
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