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Carrier 38BK Furnace Door Switch
The furnace door switch is a safety switch which inhibits the vent fan and ignitor from switching on so as to stop a potential explosion. You should really have it swapped out as soon as possible if it is defective.
Elements of an unhealthy safety switch on the furnace door
- The furnace door switch looks like it is broken
- The HVAC system does not turn on even with the door closed
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