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Whirlpool ATR1253RPP0 Furnace Door Switch
The furnace door switch is a safety switch which inhibits initial fan and burner from turning on so as to stop a potential explosion. You should have the switch be switched out ASAP if you find it to be faulty.
Major indications of a dying safety switch on the furnace door
- The HVAC system does not begin to work whether the door is open or closed
- The switch looks as if it has been bent
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