High-efficiency boiler gaskets are often compressed upon installation

6-inch diameter motors to ensure a secure

Designed with a rugged brass body and high-grade NBR seals

this switch provides the mechanical reliability needed for consistent blower activation and system mode toggling in light commercial and residential environments

Lennox 12J77 Limit L99H008 High-efficiency boiler gaskets are oftenThe Lennox 12J77 Limit Switch is a critical safety component designed for precise temperature regulation in Lennox heating systems. Engineered as a Single Pole Single Throw (SPST) device, this fixed temperature limit control ensures operational safety by monitoring internal plenum temperatures. The switch features a 60F opening point and a 35F closing point, providing an narrow differential necessary for preventing equipment overheating or cycling