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International Comfort Products NHP018AKA1 Furnace Door Switch
The furnace door switch is a safety switch which stops the fan and gas ignition from starting so as to stop a potential explosion. It is quite important to have it substituted for a new part promptly especially if you think it is defective.
Key signs of a weak safety switch on the furnace door
- The safety door switch is messed up
- The HVAC system will not begin whether the door is open or closed
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