Carrier HH18HV145 Limit Switch 321042-401 Common Questions How do I

Common Questions How do I confirm the rotation of the FAN1531

By utilizing the multiple mounting holes

meaning it breaks the circuit as temperature rises above the setpoint

Replacing it with the Armstrong Furnace R40663-002 ensures dependable startup

crucial for system safety during thermal expansion or thermostat failure

Carrier HH18HV145 Limit Switch 321042-401 Common Questions How do IThe Carrier HH18HV145 is a high precision HVAC auto limit switch engineered to maintain safe operating temperatures within gas and electric furnaces. Operating with a 115 145F temperature range, this genuine OEM replacement part acts as a critical safety barrier, automatically interrupting the circuit to the burners or heating elements if the supply plenum exceeds the 145F threshold. This auto reset limit switch is designed for demanding industrial