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International Comfort Products PGMD48H135C Furnace Door Switch
This switch prevents the vent fan and ignition sequence from activating so as to avoid injuries. It is extremely important that the device is substituted for a new part as soon as possible if it is defective in some way or another.
Symptoms to watch for in a failing switch on the furnace door
- The door switch appears to be beat up
- The HVAC system will not operate whether the door is off or on
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