773-351

Ensure your heating system operates safely and efficiently with this premium 2-stage air pressure switch. Designed for multi-stage gas furnaces, this air proving switch acts as a critical safety sensor that monitors the pressure generated by the inducer motor. It confirms that the exhaust system is clear and functioning correctly before allowing the furnace to ignite. This dual-stage component is precision-calibrated with specific set points of 0.68" WC and 0.35" WC to manage different heating cycles, preventing hazardous operation and ensuring peak performance. If your furnace is experiencing ignition failure, frequent cycling, or pressure-related error codes, this replacement pressure switch is an essential component for restoring reliable HVAC operation.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Primarily used in residential multi-stage gas furnaces to monitor venting pressure and inducer motor airflow for safe combustion cycles.
Specifications: Two-stage (2STG) operation; High-fire set point: 0.68" WC; Low-fire set point: 0.35" WC; Type: Air Proving/Differential Pressure.