The General Electric WJ26X10345 Air Conditioner Main PCB Board controls the operation of the system, organizing the work of compressors, fans, sensors and mode choice. It operates using integrated circuits, which convert command inputs and provide output signals to mechanical parts. It is mounted with the internal electronics of the unit and is connected to harnesses to motors, sensors, and control interfaces. It makes the logic central, which upholds the dependability of cooling cycles, stable airflow, and uniform system responsiveness in the operating conditions.