773-144

This premium York air pressure switch is a vital safety component for residential gas furnaces and HVAC systems. Known as an air proving switch, it is designed to detect the pressure differential created by the draft inducer blower, ensuring that combustion gases are being safely exhausted before the ignition process begins. Calibrated to a precise 0.67" WC (water column) set point, this switch protects your heating equipment by preventing operation in the event of a vent blockage or motor failure. Ideal for troubleshooting furnace ignition issues or resolving pressure switch error codes, this reliable replacement part helps maintain the performance and safety of your indoor climate control system.
Type: Air Pressure Switch
Size: Standard HVAC control component
Application: Used in forced-air gas furnaces and heating systems to monitor draft inducer airflow and ensure proper venting.
Specifications: 0.67" WC (Water Column) set point, air proving functionality, safety lockout integration.