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

this high-performance component allows your steam system to operate effectively at a maximum pressure of 125 PSI

With three field-selectable operating pressure ranges—0 to 100 psi

they often require bracket modifications

extending service life in potable water applications

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