773-340

This premium air pressure switch is an essential safety and performance component designed for modern HVAC systems and furnaces. Functioning as an air proving switch, it monitors the pressure differential created by the draft inducer motor to ensure proper airflow before the ignition sequence begins. Rated at 0.26" WC, this switch acts as a critical fail-safe, preventing the heating cycle from continuing if venting issues or blower failures are detected. It is an ideal replacement part for restoring the reliable operation of residential and commercial heating units, ensuring that combustion gases are safely exhausted and the system operates at peak efficiency.
Type: Air Pressure Switch
Size: Standard replacement component
Application: Commonly used in furnaces, boilers, and HVAC air handling units to verify blower operation and venting safety.
Specifications: Set point: 0.26" WC (Water Column); Function: Air proving and pressure monitoring