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International Comfort Products NTN3125KJA1 Furnace Door Switch
A furnace door switch is a switch that blocks the vent fan and burner being triggered to start so as to stop a potential explosion. It is crucial to have this part swapped out promptly if it is causing you problems.
Warnings of a declining safety switch on the furnace door
- The whole system does not even thing about starting even with the door closed
- The furnace door switch looks removed
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