773-183

This York two-stage air pressure switch is a vital safety component designed for high-efficiency gas furnaces and HVAC systems. As an air proving switch, its primary function is to monitor the pressure generated by the draft inducer motor, ensuring that combustion gases are being properly vented before allowing the furnace to ignite. Specifically engineered for dual-stage heating units, it features precise setpoints to verify airflow at both low and high heat cycles. If your furnace is experiencing ignition failure, frequent cycling, or error codes related to pressure sensing, replacing a faulty vacuum switch is essential for maintaining safe and efficient operation. This durable, factory-specified switch helps prevent hazardous conditions by ensuring your heating system only operates when optimal venting conditions are met.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Used in residential gas furnaces and dual-stage heating systems to monitor draft inducer pressure and ensure proper venting of flue gases.
Specifications: Dual-stage operation; Low-stage setpoint: 0.45" WC; High-stage setpoint: 0.85" WC; Air proving functionality; Normally open contacts.