Lennox 18J28 Limit Switch and 6000 series aluminum alloys

and 6000 series aluminum alloys

allows for flexible directional aiming

which prevents premature failure in high-ambient environments

oil-filled dielectric fluid within a robust aluminum housing for superior thermal dissipation and pressure-sensitive internal protection

Operating with a 24V coil

Lennox 18J28 Limit Switch and 6000 series aluminum alloysWhen 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