The York 106125, 9371DO-HS-0012, 499228/00018 Air Pressure Switch (1 Unit) is a genuine OEM single-pole normally open switch that ensures safe and efficient operation in York HVAC systems. Designed to monitor air pressure levels, this switch activates or deactivates circuits when airflow or pressure falls below 1.60" WC, providing reliable system safety control. Key Features Genuine York OEM air pressure switch Single Pole, Normally Open (SPNO) design Activates at 1.60" WC on fall Ensures safe and accurate airflow verification Reliable performance for furnace and HVAC applications Specifications Part Numbers: 106125, 9371DO-HS-0012, 499228/00018 Switch Type: Air Pressure Switch Operation: 1.60" WC on Fall Poles: Single Pole Normally Open Brand: York Compatible Models GM9S040A12UP11 FL9S040A12UP11A GF9S040A12UP11 HA300C00A5DAA2 FC9S040A12UP11A PS9A12N040UP11A RSV070A4MLTAA0A RSH060A1MLSAA0A and more Why Choose This Item Choose the York 106125, 9371DO-HS-0012, 499228/00018 Air Pressure Switch (1 Unit) to maintain safe system operation and prevent ignition failures. Built to York?s OEM standards, it offers dependable pressure control, precise response, and long-term system protection.