Lennox 73W35 Pressure Switch 2 Stage

The Lennox 73W35 Pressure Switch 2 Stage is a safety device in high-efficiency furnaces that controls the amount of pressure in the system. It is a switch that ensures the pressure levels needed are adequate both before and during the ignition process to ensure the furnace is working as it should. The Pressure Switch is designed for two-stage furnaces and works to control the change between the two stages of heating, conserving energy and providing comfort. This switch plays a role in averting challenges such as overheating and inadequate combustion by making sure that furnace only operates at safe pressure limits; thus maximizing the longevity of the system.