pool motherboard part lightly used but still lots of life left Great Compatibility — Perfectly fit for Hayward Goldline Controls Aqualogic and Aquaplus Automation Systems. Compatible with Hayward Goldline AquaLogic Automation and Chlorination 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. Perfect Design — Brand new upgraded OEM replacement for part number: GLX-PCB-MAIN, GLXPCBMAIN, G1-066008N-1, G1066008N1, GLD-451-1014, 011004G-1, HPPGLXPCBMAIN. 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. This will usually fix the no cell power problems. 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. Replacement For GLX-PCB-MAIN Only — If your system has a "heat button" at the power center, then you could use the GLX-PCB-PRO circuit board to upgrade your system to a ProLogic from your existing AquaLogic. Heater button is located on the local display (mounted in subpanel). You need to make sure you have a heater "button", not just a heater light. 100% Satisfaction Guarantee — If you're not 100% satisfied with our items, simply return it for refund within 30 days. Support 12-month Warranty. Professional & Sincere Servi