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Friedrich MW09C1H Furnace Door Switch
A furnace door switch is a safety feature that inhibits initial fan and other risky devices from starting so as to stop a potential explosion. You must have the device swapped out as quick as you can if it is damaged so as to prevent something bad happening.
What are the clues to watch out for to know my furnace door switch is on its last leg?
- The system will not operate whether the door is open or closed
- The furnace door switch looks like it is bent
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