Lennox 73W35 Pressure Switch 318973-401 Foldback Geometry: Increases surface area

Foldback Geometry: Increases surface area to reduce watt density

it provides the versatility required to tune system performance to specific static pressure requirements

Common Installation & Operation Questions What is the maximum static pressure for the VS2222

Ensure the ceramic insulator is not directly exposed to the high-intensity flame core

Lennox 73W35 Pressure Switch 318973-401 Foldback Geometry: Increases surface areaThe Lennox 73W35 Pressure Switch is a critical safety and operational component designed for 2 stage gas furnaces. This OEM Lennox replacement part, also identified by part number 102737 09, monitors the pressure differential created by the combustion air inducer to ensure the system is venting correctly before ignition. For multi stage heating, this dual stage pressure switch features precise set points: a high stage set point of 0. 55" W. C. and a