Lennox 18J28 Limit Switch Operating with a 24V coil

Operating with a 24V coil

requiring a manual reset to ensure a technician inspects the underlying cause of the overheat

the S1-2845-3171 utilizes a rugged bimetal 1/2-inch disc construction for consistent thermal response

and 6000 series aluminum alloys

ensuring a fast and secure interface for technicians during field replacements

Lennox 18J28 Limit Switch Operating with a 24V coilWhen you're troubleshooting a furnace that's short cycling or a blower motor that won't quit, the Lennox 18J28 Limit Switch is a primary diagnostic point. This genuine OEM furnace high limit switch is a critical safety component designed to monitor heat exchanger temperatures and prevent hazardous overheating. Featuring a 165F CO (Cut Out) and 135F CI (Cut In) thermal profile, this auto reset limit switch ensures the burner circuit opens if internal