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International Comfort Products HHP442GKA1 Furnace Door Switch
The job of the furnace door switch stops the vent fan and ignitor from switching on in order to prevent injury and fire. You should have the switch be changed as soon as you can if it is defective in some way or another.
Major signs poorly running switch on the furnace door
- The whole system will not run whether the door is off or on
- The furnace door switch has been removed
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