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International Comfort Products CHP448AKA1 Furnace Door Switch
A furnace door switch is a safety feature that prevents the vent fan and burner from starting so as to stop a potential explosion. You should really have it traded for new one as quick as you can especially if you think it is defective.
Clues the switch on your furnace door will need replacing
- The switch looks not there
- The furnace cannot run even when you close the door
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