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International Comfort Products H2A336GKA100 Furnace Door Switch
The job of the furnace door switch prevents initial fan and ignitor being triggered to start so as to stop a potential explosion. Do not try to fix it, just have it replaced as soon as possible if it is defective in some way or another.
Chief elements of an inadequate furnace door switch
- The door switch looks like it is chipped
- The whole system will not run whether the door is open or closed
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