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Carrier PTV Furnace Door Switch
A furnace door switch is a switch that prevents initial fan and ignitor from switching on so as to stop a potential explosion. You should really have it replaced at once if you find it to be faulty.
Some clues the switch on your furnace door is going to die
- The whole system does not turn on whether the door is open or closed
- The door switch looks as if it has been breaking off
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