Gecko Control System Circuit Board [MSPA-1 thru MSPA-4] [w/Transformer & Sensors] is a replacement Gecko circuit board intended for compatible MSPA or spa control platforms. The circuit board manages equipment operation and coordinates signals between the topside, sensors, pumps, heater, blower, ozone, and lighting functions depending on the system configuration. Because small differences in board revision, transformer layout, and sensor connections can affect compatibility, exact part matching is important. This board is typically selected after diagnosis confirms board failure or damage rather than a peripheral component issue. Compare all labels, connectors, mounting points, and included components with the existing board before installation. Spa control work involves live-voltage equipment, so a qualified technician should install and test the replacement after power is safely disconnected. Replacement Gecko control circuit board for compatible spa systems Helps restore control of connected spa equipment when the original board has failed Confirm board family, connector layout, included transformer/sensors when listed, and part number 0201-300045 Best used after troubleshooting topside, sensor, heater, and pump-related fault conditions Professional installation is recommended due to electrical safety requirements