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Carrier 48XZN048130300 Furnace Door Switch
A furnace door switch is a switch that prevents initial fan and other risky devices from activating so as to avoid injuries. Do not try to fix it, just have it switched out quickly if it is defective.
Major symptoms the switch on your furnace door will eventually need to be replaced
- The HVAC system will not run whether the door is open or closed
- The safety door switch looks as if it has been worn
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