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Haier HPD10XCM Furnace Door Switch
The furnace door switch blocks the vent fan and other risky devices from activating so as to stop a potential explosion. You should have the switch be swapped out as soon as possible if it is defective.
Cues of a defective safety switch on the furnace door
- The safety door switch looks like it is breaking apart
- The HVAC system does not even thing about starting whether the door is open or closed
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