773-388

This premium Air Pressure Switch is a critical safety component designed for high-efficiency furnaces and HVAC systems. Also known as an air proving switch, its primary function is to monitor the draft inducer motor's performance by sensing the pressure differential created during operation. Rated at 0.65" WC (Water Column), this switch ensures that your heating system only initiates the ignition sequence when proper airflow and venting are detected. A failing or faulty pressure switch is a common cause of furnace lockout or ignition failure, making this an essential replacement part for restoring reliable heat and ensuring safe operation. Engineered for durability and precision, it helps maintain peak performance in residential and commercial forced-air heating applications.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Used in gas-fired furnaces and HVAC units to monitor inducer motor airflow and ensure proper venting before ignition.
Specifications: Pressure Setting: 0.65" WC; Function: Air Proving; Sensing Type: Negative Pressure/Vacuum.