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International Comfort Products N9MPD100J20A2 Furnace Door Switch
A furnace door switch is a safety feature that stops the vent fan and gas ignition from activating in order to prevent injury and fire. It is vital that this part be changed as soon as you can if you see that it is broken.
Indications the safety door switch is going out
- The door switch appears as though it has been bent
- The HVAC system will not begin whether the door is open or closed
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