When performing a retrofit or oil top-off

Robust Build Quality: Built to withstand the thermal cycling typical of gas-fired unit heaters and duct furnaces

The Lennox 17W11 Defrost Thermostat is a critical OEM replacement part designed to regulate the defrost cycle in high-efficiency heat pump systems

Enhanced Sealing: Equipped with premium Buna-N valve seats to ensure bubble-tight shut-off and prevent hazardous gas leaks

Siemens Combustion SQM56.680R1Z3 Actuator 319848-301 When performing a retrofit orThe Siemens Combustion SQM56. 680R1Z3 Actuator is a high torque, precision engineered industrial motor designed for the rigorous demands of flow control and burner modulation. Operating on a 120V AC power supply, this reversing actuator delivers a robust 350 lb in torque (40 Nm) with a 50 second running time for a full 90 degree rotational travel. Engineered as a motor only assembly (8SwitchNoShaft), it requires a separate AGA58 series drive shaft to