Lennox 56W25 Limit Switch 321702-401 it includes the integrated sensing

it includes the integrated sensing bulb required for accurate thermal expansion monitoring of the suction line

" contributing to component longevity and energy efficiency

providing a precise fit that prevents bypass leaks and pooling

and ER402 models to ensure a reliable seal

Its rugged NEMA 2 (IP54) die-cast housing allows for flexible mounting in various orientations

Lennox 56W25 Limit Switch 321702-401 it includes the integrated sensingThe Lennox 56W25 Limit Switch is a critical OEM replacement part designed for high limit temperature monitoring in Lennox, Armstrong, and Ducane furnace assemblies. This normally closed safety component features a 3 inch insert length and operates on an automatic reset logic, ensuring the system remains protected without requiring manual intervention after a thermal event. It is engineered with a precise 250F cut out (open) temperature and a 220F cut