About this circuit board
The MS50U PC Board X801159 is an OEM circuit board designed for Master Spa hot tubs equipped with Balboa control systems. This genuine replacement control board manages your spa’s essential functions including pump operation, heating cycles, and user interface communications, ensuring reliable performance and seamless integration with your existing system.
When your spa’s control board fails, trust this exact OEM replacement to restore full functionality without compatibility issues. At Bubbles Supply, we guarantee an exact fit for your Master Spa system, backed by our comprehensive 1-year warranty and same-day shipping on in-stock items. Professional installation is recommended due to electrical connections and programming requirements – always disconnect power before beginning any control system work and consult your spa’s service manual for proper wiring procedures.








