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Trane TCP042F300AB Furnace Door Switch
The job of the furnace door switch blocks the draft inducer and ignitor from turning on so as to stop a potential explosion. It is extremely important that the device is swapped out at once if you find it to be faulty.
Cues of a failing furnace door switch
- The furnace does not function even when you close the door
- The switch appears to be wrong
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