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Friedrich MW09Y3H Furnace Door Switch
A furnace door switch is a switch that blocks the draft inducer and other risky devices being triggered to start so as to avoid injuries. You must have the device substituted for a new part at once if it is not working in order to prevent injuries.
Signs your safety switch on the furnace door is dead
- The HVAC system does not operate whether the door is open or closed
- The door mechanism appears as though it has been broken badly
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