773-390

The Dual Port Pressure Switch is a critical safety component designed for HVAC systems and forced-air furnaces. This 0.45" WC air proving switch monitors the differential pressure generated by the induced draft motor to ensure proper venting of combustion gases before the heating cycle begins. If the venting system is obstructed or the inducer motor fails to move enough air, this switch acts as a fail-safe, preventing the burner from igniting. Featuring a dual-port configuration for precise sensing, this replacement part is essential for restoring reliable furnace operation and ensuring the safe discharge of exhaust. It is a common solution for troubleshooting heating units that fail to stay lit or produce error codes related to airflow detection.
Type: Air Pressure Switch
Size: Standard
Application: Residential and commercial furnaces, HVAC air handlers, and induced draft heating systems.
Specifications: Pressure Set Point: 0.45" WC (Water Column); Port Configuration: Dual Port; Component Type: Air Proving Safety Interlock