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International Comfort Products C8MPL100J20A1 Furnace Door Switch
The job of the furnace door switch blocks the blower and ignition sequence from activating so as to avoid injuries. You should really have it traded for new one promptly especially if you suspect it is not working properly.
Warnings to watch for in a failing furnace door switch
- The door switch has been removed
- The HVAC system does not even thing about starting even when you close the door
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