Lennox 44L65 Limit Switch 321702-401 System Protection: Prevents nuisance high-limit

System Protection: Prevents nuisance high-limit trips and temperature stratification issues by providing accurate water temperature monitoring at the heat exchanger outlet

Operating on a 460V 3-phase 60Hz power supply

the parts are completely interchangeable

they often require bracket modifications

including Bryant and Payne furnaces that call for this specific part number

Lennox 44L65 Limit Switch 321702-401 System Protection: Prevents nuisance high-limitThe Lennox 44L65 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Engineered as a 160 185F AUTO limit switch, this normally closed (NC) thermal sensor monitors heat exchanger temperatures to prevent overheating and potential component failure. Functioning as a high limit safety cut out, the 44L65 features an automatic reset mechanism that restores the circuit once