773-192

This premium air pressure switch is a vital safety component for Lennox and Armstrong gas furnaces and HVAC systems. Functioning as an air-proving sensor, it monitors the negative pressure generated by the draft inducer blower to ensure that combustion gases are being properly vented before allowing the ignition process to begin. Calibrated to a precise -0.10" WC set point, this switch helps prevent hazardous conditions by shutting down the heating cycle if insufficient airflow or a venting blockage is detected. If your furnace is failing to ignite or displaying a pressure switch lockout error, this high-quality replacement part is essential for restoring safe and efficient heating performance.
Type: Air Pressure Switch / Air Proving Switch
Size: Compact
Application: Used in high-efficiency residential gas furnaces and HVAC units to monitor inducer motor airflow and combustion safety.
Specifications: Calibrated Set Point: -0.10" WC (Water Column); Function: Air Proving; Compatible with specific Lennox and Armstrong heating equipment.