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International Comfort Products HHP218GKA1 Furnace Door Switch
A furnace door switch is a safety feature that blocks the vent fan and ignitor from switching on in order to prevent injury and fire. You must have the device substituted for a new part ASAP if you see that it is broken.
Some clues the safety door switch is in need of replacing
- The whole system will not engage even when you close the door
- The switch appears as though it has been messed up
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