773-150

This high-quality HVAC air pressure switch is a critical safety component designed for residential and light commercial furnace systems. As an air proving switch, it monitors the negative pressure generated by the draft inducer motor to ensure that the combustion gases are being properly vented before the ignition sequence begins. Calibrated to a precise -0.40" WC (Water Column) set point, this vacuum switch acts as a fail-safe, preventing furnace operation if an obstruction in the flue or a malfunction in the blower motor is detected. Ideal for heating system maintenance and repair, this durable sensor helps ensure efficient, safe, and reliable furnace performance during the heating season.
Type: Air Pressure Switch
Size: Standard
Application: Used in forced-air furnaces and heating equipment to verify airflow and draft inducer operation for combustion safety.
Specifications: -0.40" WC Set Point, Vacuum-Actuated, Single-Stage Air Proving