773-124

This York 2-stage air pressure switch is a vital safety and performance component for modern high-efficiency gas furnaces. Functioning as an air proving switch, it monitors the venting pressure created by the draft inducer motor to ensure exhaust gases are safely cleared before the ignition cycle begins. This specific dual-stage model features calibrated trip points of 0.70" WC and 1.25" WC, allowing it to accurately manage airflow for both low-heat and high-heat operation. It is a common replacement part for HVAC systems experiencing ignition failure, intermittent shutdowns, or pressure switch fault codes, helping to restore reliable heating and maintain household safety.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Designed for use in residential two-stage gas furnaces and forced-air heating systems to monitor combustion air pressure and ensure proper venting.
Specifications: Two-stage operation; Low-stage setpoint: 0.70" WC; High-stage setpoint: 1.25" WC; Air proving functionality.