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Friedrich MW12C1H Furnace Door Switch
The job of the furnace door switch stops the blower and other risky devices from activating in order to prevent injury and fire. You should really have it exchanged for a new one immediately if you can, if it is damaged so as to prevent something bad happening.
Warnings of a defective safety door switch
- The switch looks as if it has been not there
- The whole system does not begin to work even when you close the door
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