773-171

This high-performance ICP Air Pressure Switch is a critical safety component designed for residential gas furnaces and HVAC systems. As an essential air proving switch, it monitors the pressure differential generated by the draft inducer motor to ensure that combustion gases are being properly exhausted through the flue. Rated at a precise 1.38" WC (Water Column) set point, this switch prevents the heating cycle from proceeding if it detects insufficient airflow or a venting obstruction. This replacement part is vital for restoring safe furnace operation and resolving common ignition failure issues related to pressure sensing errors.
Type: Air Pressure Switch
Size: Standard
Application: Used in gas-fired furnaces and heating units to verify proper inducer motor operation and venting safety.
Specifications: Pressure Setting: 1.38" WC; Function: Air Proving/Safety Interlock