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International Comfort Products GPFM18K040F Furnace Door Switch
The furnace door switch is a safety switch which blocks initial fan and other risky devices from switching on so as to stop a potential explosion. It is imperative that the switch be replaced at once if it is damaged so as to prevent something bad happening.
Major indications the switch on your furnace door is dying
- The HVAC system does not operate with the door closed
- The door switch looks like it is messed up
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