773-387

This high-performance dual air pressure switch is a vital safety component for residential and commercial HVAC systems, particularly gas furnaces. Acting as an air proving switch, this part monitors the pressure differential created by the draft inducer motor to ensure that combustion gases are being properly vented before the ignition cycle begins. Featuring two specific setpoints at 0.35" WC and 0.65" WC, it provides precise airflow monitoring to prevent unsafe operating conditions. If your heating system is experiencing startup failures or is shutting down prematurely due to venting issues, this dual-stage pressure switch is a reliable replacement designed to restore safe and efficient furnace operation.
Type: Air Pressure Switch
Size: Small
Application: Gas furnaces, forced-air heating systems, and HVAC venting safety circuits.
Specifications: Dual setpoint configuration: 0.35" WC / 0.65" WC; diaphragm-actuated sensing; designed for air proving and draft verification.