773-367

This premium York/ETC 3-terminal air pressure switch is a vital safety component designed for high-efficiency HVAC systems and gas-fired furnaces. As an essential air proving switch, it monitors the pressure differential created by the draft inducer motor to ensure proper venting and combustion airflow. If the system detects a blocked flue or insufficient air movement, this switch prevents the ignition sequence, protecting your home from potential hazards. Rated at a precise 0.85" WC set point, this durable replacement part ensures your heating system operates safely and reliably during the coldest months. Whether you are performing routine maintenance or a critical repair, this pressure switch provides the precise electrical sensing required for modern furnace control boards.
Type: Air Pressure Switch
Size: Standard HVAC component size
Application: Used in gas-fired furnaces and HVAC heating units to monitor draft inducer airflow and ensure safe combustion conditions.
Specifications: 0.85" Water Column (WC) pressure rating, 3-terminal electrical connection, air proving safety functionality.