773-120

The York Pressure Switch 1.20" WC is a critical safety and performance component designed for high-efficiency HVAC systems and gas furnaces. This air proving switch functions as a vacuum-actuated sensor that monitors the pressure generated by the draft inducer motor. By verifying that combustion gases are being properly vented, it allows the furnace to proceed through its ignition sequence, ensuring a safe and reliable heating cycle. If your furnace is failing to ignite or displaying a pressure switch error code, this high-quality replacement part is essential for restoring proper airflow detection. Built for durability and precision, this switch helps prevent hazardous conditions by shutting down the system if venting is obstructed or the inducer fan fails.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Commonly used in residential gas furnaces and HVAC heating units to monitor inducer motor airflow and verify proper venting before ignition.
Specifications: Pressure Setting: 1.20" WC (Water Column); Function: Normally Open (Closes on pressure rise/fall depending on circuit); Application: Air Proving/Draft Verification.