Lennox 69M40 Limit Switch 322057-301 Optimized Performance: Restores efficient airflow

Optimized Performance: Restores efficient airflow and proper manifold pressure for reliable ignition and combustion

7% efficiency at full load

serving as the logic center for monitoring coil temperatures and managing timing intervals

Never attempt to use this valve with LP without the proper spring and orifice modifications

The unit features a 72-inch capillary tube

Lennox 69M40 Limit Switch 322057-301 Optimized Performance: Restores efficient airflowThe Lennox 69M40 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in residential and commercial heating systems. This L170 40F limit switch operates on an automatic reset logic, featuring a fixed cut out temperature of 170F and a cut in temperature of 140F. Designed as a genuine Lennox replacement part, the 69M40 ensures consistent circuit interruption to prevent heat exchanger damage or hazardous overheating