773-088

This premium 2-stage furnace air pressure switch is a critical safety component designed for high-efficiency gas furnaces. As an air-proving sensor, it monitors the draft created by the inducer motor to ensure the venting system is clear and functioning correctly before allowing the ignition process to start. Specifically calibrated for dual-stage heating systems, it features precise setpoints of -0.35" WC and -0.45" WC to detect proper vacuum pressure. Replacing a faulty pressure switch can resolve common HVAC issues such as furnace ignition failure, intermittent cycling, or pressure switch lockout codes. This durable component ensures your residential heating system operates safely and efficiently throughout the winter.
Type: Air Pressure Switch
Size: Standard
Application: Used in high-efficiency residential gas furnaces and two-stage HVAC systems to monitor combustion air pressure and ensure proper venting.
Specifications: Two-stage operation; Setpoints: -0.35" WC (Water Column) and -0.45" WC; Dual-stage air proving functionality; Designed for inducer motor draft sensing.