When the furnace high limit sensor detects temperatures exceeding the 130°F threshold

requiring only a standard drill opening and 3/8" tubing for port connection

effectively shutting down the system if hazardous heat levels are detected

This anti-short cycle timer functions as a universal voltage relay

This component is cross-referenced and is physically identical to the Lennox 47K0901

Schneider Electric (Barber Colman) AM-122 Connector When the furnace high limitFor field technicians and mechanical contractors managing damper assemblies and valve trains, the Schneider Electric (Barber Colman) AM 122 is a critical straight link connector designed for the high precision synchronization of 5 16 inch parallel shafts. Built with a heavy duty balljoint mechanism, this hardware ensures smooth torque transmission and eliminates mechanical binding in HVAC actuator linkages. The AM 122 is fully interchangeable with