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International Comfort Products VNK100J16A1 Furnace Door Switch
The job of the furnace door switch inhibits the draft inducer and ignitor from turning on so as to stop a potential explosion. It is important to get the part substituted for a new part ASAP if it is defective in some way or another.
Subtle hints the switch on your furnace door will have to be replaced
- The door switch appears to be broken badly
- The HVAC system does not operate whether the door is open or closed
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