This is a genuine Hayward replacement board, designed for direct installation in compatible systems. It is commonly used to restore proper system operation when an existing board has failed, as well as to upgrade older systems to support newer Hayward equipment and features.

Compatible Automation Systems

Compatibility is critical when replacing automation circuit boards. The Hayward Pro Logic Main Circuit Board is designed for use with the following Hayward automation platforms:

• Hayward Pro‑Logic automation systems
  P‑4, PS‑4, PS‑8, PS‑16 (all revisions and date codes)
• Hayward AquaPlus automation systems

This board is not interchangeable with other Hayward automation platforms or non‑Hayward systems. If you are unsure which automation system you have, confirming compatibility before ordering is strongly recommended.

Replacement vs. Upgrade Capabilities

In systems originally equipped with a GLX‑PCB‑MAIN, installing the GLX‑PCB‑PRO functions as both a repair and a functional upgrade.

Compared to the older MAIN board, the PRO version enables additional system capabilities, including:

• Control of compatible Hayward variable‑speed pumps, such as EcoStar models
• Selectable salt cell sizing, allowing configuration for T‑Cell‑5, T‑Cell‑9, or T‑Cell‑15
  (the MAIN board is limited to T‑Cell‑15 only)
• Improved compatibility with newer Hayward accessories and firmware revisions

After installation, the Pro‑Logic system automatically detects the connected display, salt system, and accessories, enabling the appropriate feature set based on the overall system configuration.

For customers looking to restore reliability while gaining broader equipment compatibility, the GLX‑PCB‑PRO is the preferred replacement option.

What This Board Controls

When installed in a compatible Pro‑Logic or AquaPlus system, the main circuit board is responsible for managing:

• Filtration schedules
• Salt chlorination output and system communication
• Heater control and temperature logic
• Pool and spa lighting
• Auxiliary equipment and automation functions

Because this is the central logic board, overall system performance and reliability depend heavily on the condition and proper operation of this component.

Installation Notes

This product is commonly purchased by customers who plan to install the board themselves. It is designed as a direct replacement, using existing mounting points and wiring connections within the automation enclosure.

For customers who prefer professional installation, the board can also be supplied and installed by a Lakeshore Pools technician as part of a scheduled service visit. Service installations are billed separately and are not included with the purchase of the board alone.

Warranty & Local Support — The 0.1% Standard

Warranty support for the Hayward Pro Logic Main Circuit Board is handled directly through our service department, the same way we support the automation systems we sell and service every day.

By managing warranty support locally, customers benefit from:

• Faster response times than manufacturer‑only support
• Clear communication from a single service team
• Reduced downtime during diagnostics and repairs
• Proper follow‑through from start to finish

This reflects how we apply The 0.1% Standard—ensuring replacement parts are correctly selected, installed properly, and supported long after purchase.

Owner’s Manual & Technical Resources

Hayward documentation provides additional guidance for installation, configuration, and operation:

• Hayward Pro‑Logic Owner’s Manual
• Hayward Pro‑Logic Installation & Configuration Guide
• Hayward Automation System Troubleshooting

These resources include wiring information, programming guidance, and compatibility details.