773-346

This premium air pressure switch is a vital safety component designed for high-efficiency furnaces and HVAC systems. As a dual-port air proving switch, it accurately monitors the differential pressure generated by the draft inducer motor to ensure that combustion gases are being properly vented before allowing the ignition sequence to begin. With a precise factory set point of 1.71" WC (Water Column), this SPST (Single Pole Single Throw) switch provides reliable performance and helps prevent hazardous operation in the event of a venting obstruction or mechanical failure. If your heating system is failing to ignite or shutting down prematurely due to pressure-related error codes, replacing the pressure switch can restore safe and efficient operation. Engineered for durability and precision, this component is essential for maintaining the safety standards of modern residential heating equipment.
Type: Air Pressure Switch
Size: Small
Application: Commonly used in forced-air furnaces and residential heating systems to monitor inducer motor pressure and ensure safe exhaust venting.
Specifications: Pressure Rating: 1.71" WC; Switch Type: SPST (Single Pole Single Throw); Port Configuration: Dual Port; Function: Air Proving/Safety Interlock