773-117

Ensure your heating system operates safely and efficiently with this premium dual-stage air pressure switch designed for Trane and American Standard furnaces. As a vital safety component, this air proving switch monitors the vacuum pressure created by the inducer motor, ensuring that combustion gases are properly vented before allowing the furnace to ignite. Specifically engineered for two-stage heating systems, it features two distinct set points to handle varying airflow requirements during high and low heat cycles. If your furnace is experiencing ignition failure or intermittent shut-offs, this replacement vacuum switch is essential for restoring reliable HVAC performance and maintaining home safety.
Type: Air Pressure Switch
Size: Standard HVAC component
Application: Used in high-efficiency two-stage gas furnaces and residential heating systems to monitor inducer motor airflow and provide safety interlocking for the ignition sequence.
Specifications: Dual-stage configuration; Low-stage set point: 0.88" WC; High-stage set point: 1.60" WC; Function: Air proving and vacuum sensing.