773-250

This high-quality two-stage air pressure switch is a critical safety component designed for high-efficiency gas furnaces and residential heating systems. Functioning as an air proving switch, it monitors the vacuum pressure created by the inducer draft motor to ensure that combustion gases are being properly exhausted before the furnace is allowed to ignite. Specifically engineered for dual-stage heating units, this switch accurately detects pressure levels for both low-fire and high-fire operations. Replacing a failing pressure switch can resolve common furnace issues such as ignition failure, intermittent cycling, or lockout conditions, ensuring your HVAC system operates safely and at peak efficiency during the cold season.
Type: Air Pressure Switch
Size: Small
Application: Used in high-efficiency dual-stage gas furnaces and HVAC units to prove airflow and inducer motor operation.
Specifications: Dual-stage functionality; Low-stage set point: -0.30" WC; High-stage set point: -0.75" WC; Diaphragm-actuated safety mechanism.