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Lennox G61MPV-60D-135 Furnace Door Switch
The furnace door switch is a safety switch which stops the fan and ignitor from turning on so as to stop a potential explosion. You should have the switch be traded for new one quickly if it is not working in order to prevent injuries.
Symptoms of an ailing furnace door switch
- The furnace door switch looks like it is beat up
- The furnace will not begin even when you close the door
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