Jacuzzi Designer IV Electronic Control Box GD31000 Replaces IES 4 EJ10000 and EJ07000 Whirlpool JWB JLB

Restore precise, reliable control to your Jacuzzi Designer IV with the Electronic Control Box GD31000—the targeted replacement module engineered to bring back smooth operation of your spa’s jets, pump cycles, and heating. Designed for refurbishment and service scenarios, this GD31000 unit is a key part of the GD31 family and aligns with a range of Designer IV installations where older controller parts were used.

Exact compatibility and substitution details

• Replaces IES 4 EJ10000 and IES 4 EJ07000, providing a seamless upgrade path for aging control systems.
• Also known as: Jacuzzi JWB and Jacuzzi JLB, reflecting common cross-references found in service catalogs.
• Part numbers and identifiers associated with this unit: GD31000; GD31XXX; GD31959; ED31902; GD31.
• Unfinished unit intended for professional installation or careful refurbishment projects.

What it means for your spa

The GD31000 control box coordinates the essential functions of a Designer IV Jacuzzi, translating user input into coordinated action—from heater engagement and pump cycling to jet operation and system diagnostics. With this specific GD31000 module, you can expect:

• Accurate temperature regulation and reliable startup sequences
• Consistent control over spa functions, reducing downtime and troubleshooting time
• Compatibility within the GD31XXX family, ensuring easier cross-referencing during repairs

Who this is for

Ideal for service technicians, spa repair professionals, and experienced DIY enthusiasts performing legitimate refurbishment on Designer IV whirlpools. If your unit relied on GD31XXX components or IES EJ-series replacements, the GD31000 is the precise match to restore operation without compromising control integrity.

Practical tips and considerations

• Verify that GD31000 corresponds to your specific Designer IV model and production run before purchasing.
• Use the cross-reference identifiers (GD31XXX, GD31959, ED31902) to confirm compatibility with related control components in your system.
• Engage a qualified technician for installation to ensure proper wiring, interlocks, and safety considerations are respected.

Reclaim reliable spa control with the Jacuzzi Designer IV Electronic Control Box (GD31000). Ready for repair and renewal, it’s the targeted solution for keeping your hot tub’s core functions in sync and delivering a consistent, relaxing soak.