Lennox 73W35 Pressure Switch 318973-401 Ensure the ceramic insulator is

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

this Robertshaw control features a temperature range of 175°F to 550°F

This unit is designed to maximize thermal efficiency by forcing warm air circulation

streamlining the swap-out process for service contractors

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

Lennox 73W35 Pressure Switch 318973-401 Ensure the ceramic insulator isThe 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