The York S1-031-02986-000 Control Board serves as the primary nervous system for your HVAC system. This control board is compact and efficient, measuring only 8" x 3" x 7", yet it manages the complete operation of your HVAC system. It processes data from numerous sensors, makes judgments, and directs the system to respond accordingly. This offers maximum comfort and energy economy. https://www.partshnc.com/york-s1-031-02986-000-control-board