773-091

Ensure your high-efficiency heating system operates safely with this high-quality two-stage air pressure switch. Specifically engineered for multi-stage gas furnaces, this air-proving switch monitors the vacuum pressure generated by the inducer motor to confirm that exhaust gases are being vented correctly. It features precise dual setpoints of -0.35" WC and -0.40" WC to maintain the delicate balance required for multi-stage combustion cycles. If your furnace is failing to ignite, cycling off prematurely, or displaying pressure-related fault codes, this replacement sensor is essential for restoring reliable performance. Built for durability and accuracy, it serves as a critical safety mechanism to prevent hazardous operation by ensuring proper airflow before the ignition process begins.
Type: Air Pressure Switch
Size: Standard HVAC replacement component
Application: Used in residential two-stage gas furnaces and high-efficiency heating systems to monitor inducer motor performance and venting safety.
Specifications: Two-stage operation; Pressure Setpoints: -0.35" WC and -0.40" WC; Function: Air proving/Safety shut-off; Compatible with vacuum-sensing HVAC applications.