The Hayward AquaLogic Main Circuit Board (GLX‑PCB‑MAIN) is the original central control board used in older Hayward AquaLogic automation systems. It manages core automation functions such as filtration scheduling, salt chlorination control, heating, lighting, and system communication within the automation panel.

This is a genuine Hayward replacement board, intended to restore proper operation in compatible AquaLogic systems where the existing circuit board has failed or become unreliable. It is designed as a direct replacement for systems originally equipped with the MAIN board.

Compatible Automation Systems

Compatibility is critical when replacing automation circuit boards. The Hayward AquaLogic Main Circuit Board is designed specifically for:

• Hayward AquaLogic automation systems
  (original AquaLogic platforms)

This board is not compatible with Hayward Pro‑Logic or OmniLogic systems and is not interchangeable with the GLX‑PCB‑PRO.

If you are unsure whether your system is AquaLogic or Pro‑Logic, confirming the existing board model before ordering is strongly recommended.

Replacement Scope and System Capabilities

The GLX‑PCB‑MAIN is designed to restore original AquaLogic functionality, not to expand system capabilities beyond the original platform limits.

When installed in a compatible AquaLogic system, this board supports:

• Filtration scheduling
• Heater control
• Pool lighting and auxiliary equipment
• Salt chlorination configured for T‑Cell‑15 only

Unlike the PRO board, the MAIN board does not support selectable salt cell sizing and is limited to T‑Cell‑15 operation.

Important Feature Limitations

To help customers select the correct replacement board, the following limitations should be noted:

• Does not support control of Hayward variable‑speed pumps
• Salt chlorination is limited to T‑Cell‑15 (no T‑Cell‑5 or T‑Cell‑9 selection)
• Does not enable compatibility with newer Hayward automation accessories

For systems requiring variable‑speed pump control or flexible salt cell selection, upgrading to the GLX‑PCB‑PRO may be more appropriate, provided the automation platform is compatible.

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 AquaLogic 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. Installation services are billed separately and are not included with the purchase of the circuit board alone.

When the MAIN Board Is the Correct Choice

The Hayward AquaLogic Main Circuit Board is the correct replacement option when:

• The system is an original AquaLogic platform
• The existing salt system uses a T‑Cell‑15
• Variable‑speed pump control is not required
• The goal is to restore reliable operation without altering system capabilities

Selecting the MAIN board ensures compatibility with the original system design and avoids unnecessary upgrades.

Warranty & Local Support — The 0.1% Standard

Warranty support for the Hayward AquaLogic Main Circuit Board is handled directly through our service department, the same way we support the automation equipment 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
• Fewer delays 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 on installation and system configuration:

• Hayward AquaLogic Owner’s Manual and Installation Guides
• Hayward Automation System Troubleshooting

These resources include wiring diagrams, programming instructions, and compatibility details.