Lennox 66J78 Limit Switch Els PW 17895 and shuttering valves caused by

and shuttering valves caused by mineral scale or mechanical wear

The Lennox 12K48 LP Burner Orifice is a critical component for maintaining precise manifold pressure in Lennox furnace LP conversion kits

This model is foot-print compatible with most standard industry mounts

Using this component for high-voltage loads can result in insulation failure and system damage

Lennox 66J78 Limit Switch Els PW 17895 and shuttering valves caused byExperienced HVAC contractors recognize the Lennox 66J78 Limit Switch as a critical safety component for maintaining furnace integrity and preventing heat exchanger damage. This OEM Lennox replacement part is a 36T series disc style control designed for High Limit or Secondary Rollout applications. It features a Normally Closed (NC) circuit that opens on temperature rise to interrupt the heating cycle if internal temperatures exceed safe operating