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Whirlpool ATR1242SPP0 Furnace Door Switch
The furnace door switch prevents initial fan and other risky devices being triggered to start so as to avoid injuries. You must have the device swapped out at once if it is causing you problems.
Some clues of a poorly performing switch on the furnace door
- The switch looks as if it has been stuck
- The whole system does not turn on even when you close the door
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