773-029

This premium 2-stage air pressure switch is a critical safety component designed for high-efficiency residential gas furnaces. Engineered to monitor the pressure within the draft inducer motor assembly, this air proving switch ensures that your HVAC system is venting combustion gases safely and effectively before allowing the ignition process to begin. Operating with dual setpoints of -0.90" WC and -0.45" WC, this replacement part is essential for restoring proper heating performance in two-stage heating systems. If your furnace is failing to ignite or displaying a pressure switch lockout error, this reliable sensor is the ideal solution to ensure peak efficiency and home safety.
Type: Air Pressure Switch
Size: Standard
Application: Used in two-stage residential gas furnaces and high-efficiency HVAC systems to verify inducer motor performance and flue gas venting.
Specifications: Dual-stage operation; High-fire setpoint: -0.90" WC; Low-fire setpoint: -0.45" WC; vacuum-actuated sensing.