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International Comfort Products NTC6050FBA1 Furnace Door Switch
The furnace door switch blocks the vent fan and other risky devices from turning on so as to stop a potential explosion. Do not try to fix it, just have it changed at once especially if you suspect it is not working properly.
Major warnings of a dying safety door switch
- The safety door switch appears to be worn down
- The HVAC system will not fire up whether the door is off or on
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