York S1-031-09151-000 Control Board 321042-401 the "B" port is typically

the "B" port is typically closed to the "A" port

Key Benefits for Technicians OEM Compatibility: Serves as the genuine York replacement motor

and necessary gaskets to fully restore the internal mechanical integrity of the V-5252 valve body

While both function as pump controllers

Operating on a standard 115V single-phase circuit at 1725 RPM

York S1-031-09151-000 Control Board 321042-401 the "B" port is typicallyThe York S1 031 09151 000 Control Board is a critical 4 stage expansion control designed for precise regulation within multi stage HVAC systems. Engineered to interface seamlessly with 24V AC circuits, this OEM York circuit board manages the complex sequencing of up to four levels of heating or cooling modulation. By integrating real time data from system sensors and thermostats, the S1 031 09151 000 ensures the equipment operates at peak efficiency,