Great Compatibility — Perfectly fit for Hayward Goldline AquaLogic Automation and Chlorination System All Versions All Date Codes Models: AQL-PS-4, AQL-PS-8-V, AQL-PS-8, AQL-PS-16-V and AQL-PS-16. Also fits for Wired Remote Control Automation Model AQL-SS-6B-BOX. (NOTE: Does Not fit for Aqua Plus or Pro Logic system) Brand new upgraded OEM replacement for part number: GLX-PCB-MAIN / GLXPCBMAIN, G1-066008N-1 / G1066008N1, GLD-451-1014, 011004G-1. This newest revision circuit board will upgrade your system to be compatible with T-CELL-3, T-CELL-9, TCELL-15 and the new Ecostar vaiable speed pumps. Perfect Design — This GLX-PCB-MAIN circuit board is a central control unit for the system, responsible for managing and coordinating various functions and features. It is a crucial component that allows you to control and monitor your pool or spa equipment, such as lights, heaters, pumps and sanitization system. Provides the interface between the user and the system, allowing for convenient programming, scheduling and customization of the pool or spa operations. Seamless Integration and Functionality — Make sure that All circuit breakers are OFF prior to PCB replacement. Also note that the sensor and display communication terminal blocks can be simply unplugged from the old PCB and reinserted into the new PCB — you don’t need to disconnect/reconnect individual wires. Make sure that the local display is plugged in before turning power back on so that the new PCB can properly determine the system model type (P-4, PS-4, PS-8, PS-16). Superior Quality — Advanced microprocessor-based high-precision PCB manufacturing, soldering and assembly technology, meets or exceeds OEM specifications, professional tests to ensure optimal performance and long-lasting reliability. Provides superior control systems and innovative technology. Makes sure all your equipment operates at peak efficiency for minimum energy usage and cost. Great Compatibility — Perfectly fit for Hayward Goldline AquaLogic Automation and Chlorination System All Versions All Date Codes Models: AQL-PS-4, AQL-PS-8-V, AQL-PS-8, AQL-PS-16-V and AQL-PS-16. Also fits for Wired Remote Control Automation Model AQL-SS-6B-BOX. (NOTE: Does Not fit for Aqua Plus or Pro Logic system).