Lennox 20J83 Limit Switch Designed for seamless field adaptation

Designed for seamless field adaptation

functioning within a defined 120-160°F temperature range to prevent heat exchanger damage or unsafe operating conditions

and sophisticated energy management systems

These female flare fittings rely on a metal-to-metal seal or standard copper crush washers/gaskets depending on the specific application requirements on the job site

Lennox 20J83 Limit Switch Designed for seamless field adaptationThe Lennox 20J83 Limit Switch (Model 20J8301) is an essential HVAC OEM replacement part engineered for precise thermal management in high efficiency furnaces. This single pole, single throw (SPST) automatic control is factory calibrated to actuate at 165F, effectively breaking the circuit to prevent heat exchanger damage or unsafe operating conditions. Once the plenum temperature cools to 135F, the switch automatically resets, restoring normal system