The York 562745 (9371VO-BS-0051, 496686/00718) Air Pressure Switch is a factory-calibrated safety component used to monitor and control airflow or pressure within York HVAC systems. Designed to activate at 0.15? WC on pressure fall, this SPNO (Single Pole Normally Open) switch ensures safe system operation by preventing ignition or fan start under inadequate airflow conditions. Reliable and durable, it is an essential part for maintaining safety and performance in heating and air handling units. Key Features: Genuine OEM York air pressure switch for precise system protection. Activates at 0.15? WC on fall to monitor airflow accurately. SPNO (Single Pole Normally Open) configuration for safety control circuits. Prevents system operation during low or loss of airflow. Durable and dependable design for long-lasting reliability. Specifications: Part Numbers: 562745, 9371VO-BS-0051, 496686/00718 Type: Air Pressure Switch Set Point: 0.15? WC (on fall) Contact Type: SPNO (Single Pole Normally Open) Application: HVAC furnace and air handling systems Function: Detects airflow or pressure to enable safe operation Manufacturer: York Compatible Models: B6HQ042A06Y, D1NQ060N09006NX, D1NQ060N11046, D6NQ060N09006NX, B1HQ048A25, BBUQF042A, DAYQF060N080X, D1EQ060A25, D1NQ060D11025, D7NQ060N06506NX, and more. Why Choose This Item: The York 562745 Air Pressure Switch provides accurate airflow monitoring and reliable safety control, ensuring your HVAC system operates safely and efficiently. Built to OEM standards, it offers precise activation, long service life, and easy replacement ? the ideal choice for maintaining York system reliability and safety compliance.