773-341

This premium air pressure switch is a critical safety component designed for residential and commercial heating systems. As an air-proving switch, it monitors the pressure within the furnace combustion chamber to ensure the inducer fan is moving air correctly before the ignition process begins. Rated at 0.55" WC (Water Column) with an SPST (Single Pole Single Throw) configuration, this switch helps prevent the furnace from operating under unsafe venting conditions. It is a high-quality replacement part specifically engineered for Lennox HVAC systems, commonly used to resolve ignition failures, intermittent furnace cycling, and pressure switch lockout codes.
Type: Air Pressure Switch
Size: Standard HVAC control part
Application: Used in forced-air furnaces and HVAC units to prove airflow and monitor inducer motor performance.
Specifications: 0.55" Water Column (WC) set point, SPST (Single Pole Single Throw) contact arrangement, Air Proving functionality