773-090

Ensure your heating system operates safely and efficiently with this premium 2-stage air pressure switch. Designed for high-efficiency gas furnaces, this air-proving switch acts as a critical safety sensor by monitoring the draft inducer motor's performance. It verifies that the correct vacuum pressure is present to safely exhaust combustion gases before allowing the ignition process to start. Specifically calibrated for dual-stage systems, it manages both low and high-heat cycles to maintain optimal performance. This replacement part is ideal for resolving furnace issues such as failed ignition, intermittent shut-offs, or pressure-related fault codes, helping to restore reliable warmth to your home.
Type: Air Pressure Switch
Size: Standard
Application: Used in residential two-stage high-efficiency gas furnaces and HVAC heating systems to monitor combustion air and ensure proper venting.
Specifications: Dual-stage calibration; Low-stage set point: -0.50" WC; High-stage set point: -0.80" WC; Air proving safety function.