773-051

This premium 2-stage air pressure switch is a vital safety component for high-efficiency gas furnaces. Designed as an air-proving switch, it monitors the differential pressure generated by the draft inducer motor to ensure that combustion gases are being safely exhausted before allowing the furnace to ignite. Featuring dual-stage calibration at 1.60" WC and 0.81" WC, it is specifically engineered for two-stage heating systems, ensuring precise performance during both low-fire and high-fire cycles. If your heating system is experiencing ignition failure, intermittent cycling, or triggering pressure switch error codes, this replacement part is essential for restoring safe and efficient HVAC operation.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: High-efficiency two-stage gas furnaces and residential heating systems requiring air-proving safety controls.
Specifications: Dual-stage sensing; High-stage setpoint: 1.60" WC; Low-stage setpoint: 0.81" WC; Air-proving functionality; Designed for induced-draft combustion systems.