GLX-PCB-MAIN Main Printed Circuit Board Replacement for Hayward Goldline AquaLogic Automation Systems. The main printed circuit board will compatible with models AQL-PS-4, AQL-PS-8-V, AQL-PS-8 AQL-PS-16-V, AQL-PS-16. Core Control Hub: The GLX-PCB-MAIN main circuit board is a central control unit designed specifically for pool and spa automation systems. It efficiently manages and coordinates various devices, including pumps, heaters, lights, and sanitization systems, ensuring smooth and uninterrupted operation of your pool or spa. Smart and Convenient Operation: This circuit board provides an intuitive interface between the user and the automation system, supporting easy and quick programming, scheduling, and customization. It allows you to effortlessly control all the functions of your pool or spa, providing a more comfortable and convenient user experience. NOTE-Please confirm whether your model is suitable before buying. Key Installation Note: During the installation process, pay close attention to keeping the wires tight—do not allow any looseness to ensure the system works normally after setup. GLX-PCB-MAIN Main Printed Circuit Board Replacement for Hayward Goldline AquaLogic Automation Systems