Lennox 66J78 Limit Switch Els PW 17895 Using this component for high-voltage

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

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

This 160F CO Auto Limit Switch acts as a critical safety benchmark

the flame sensor may be fouled with carbon or have a cracked insulator

A 70W heater is sized to maintain proper oil viscosity for specific compressor frames

Lennox 66J78 Limit Switch Els PW 17895 Using this component for high-voltageExperienced 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