773-157

This premium Lennox Pressure Switch is an essential safety component designed for residential gas furnaces. Engineered to monitor the air pressure within your HVAC system, this air proving switch ensures that the draft inducer motor is creating the necessary vacuum for safe combustion and proper venting of flue gases. Operating at a precise -0.31" WC (Water Column) set point, this sensor acts as a critical fail-safe, preventing the furnace from igniting if a venting obstruction or motor failure is detected. If your heating system is experiencing ignition issues or pressure switch lockout codes, this high-reliability replacement part helps restore efficient and safe operation. It is built to meet rigorous HVAC standards for long-lasting performance in home heating environments.
Type: Air Pressure Switch
Size: Compact
Dimensions: not specified × not specified × not specified
Application: Used in residential gas furnaces and HVAC heating systems to prove draft inducer operation and ensure safe venting before ignition.
Specifications: Set point: -0.31" WC (Water Column); Function: Air proving and combustion safety monitoring.