773-331

This premium single-port air pressure switch is a vital safety component designed for modern HVAC and furnace systems. Engineered to monitor the pressure differential within the combustion chamber, this air proving switch ensures that the inducer fan is creating the necessary draft for safe exhaust venting before allowing the ignition process to begin. With a precision set point of 0.50" WC (Water Column), it effectively detects venting obstructions or motor failures, preventing the appliance from operating under unsafe conditions. If your heating system is experiencing ignition failure or throwing pressure-related error codes, this reliable replacement part helps restore consistent performance and peace of mind. Its durable construction is built to handle the rigors of frequent heating cycles in residential and light commercial applications.
Type: Air Pressure Switch
Size: Standard compact HVAC switch
Application: Commonly used in forced-air furnaces, gas-fired heating units, and HVAC systems to verify proper airflow and inducer motor operation.
Specifications: Single port configuration; Pressure setting: 0.50" WC; Function: Air proving and safety limit monitoring.