♨️ Jacuzzi J-300 Series LCD Topside Control Panel – Compatible with J-LX & J-XL Control Systems

Precision control for effortless Jacuzzi hot tub management with an intuitive 8-button LCD interface.

📋 Product Overview

The Jacuzzi J-300 Series LCD Topside is an OEM electronic control panel designed specifically for Jacuzzi spas equipped with J-LX and J-XL control systems. This complete topside unit features an LCD display and 8-button configuration, providing comprehensive control over your spa’s functions including dual pump operation, lighting, and programming features.

Engineered as a direct replacement for the 6600-383 topside, this panel fits many J-300 series 2-pump models, ensuring seamless compatibility with your existing Jacuzzi system. The durable construction is designed to withstand demanding spa environments, whilst the intuitive button layout offers easy access to all essential spa functions.

Whether you’re replacing a faulty topside or restoring your spa’s control functionality, this genuine Jacuzzi component ensures reliable performance and proper integration with your J-LX or J-XL control system.

⭐ Key Features

• ✅ Genuine Jacuzzi OEM Component – Authentic manufacturer part for guaranteed compatibility
• ✅ LCD Display – Clear visual feedback for temperature, settings, and system status
• ✅ 8-Button Configuration – Complete control with Clear Ray, Program, Light, Minus, Plus, Jet1, and Jet2 functions
• ✅ Dual Pump Support – Controls up to 2 pumps for full hydrotherapy functionality
• ✅ J-LX & J-XL Compatible – Designed for Jacuzzi’s J-LX and J-XL control systems
• ✅ Direct Replacement for 6600-383 – Plug-and-play installation for matching systems
• ✅ Electronic Complete Topside – Full topside unit, not just an overlay
• ✅ Molex Style Connector – Secure, reliable connection to spa pack
• ✅ Durable Construction – Built to withstand spa environments
• ✅ Clear Ray Function – Integrated control for Jacuzzi’s UV water purification system

🔧 Technical Specifications

Specification	Value
Brand	Jacuzzi
OEM	Jacuzzi
Product Type	Topside Panel
Display Type	LCD
Number of Buttons	8
Button Functions	Clear Ray, Program, Light, Light, Minus, Plus, Jet1, Jet2
Topside Type	Electronic, complete topside
Max Pumps Supported	2
Connector Type	Molex Style Plug
Replaces Part Number	6600-383
Compatible Systems	Jacuzzi J-LX, J-XL Control Systems
Fits Models	J-300 Series (2-pump models)

🔗 Compatibility Guide

This Topside Control is Compatible With:

Spa Pack/System	Series	Confirmed
Jacuzzi J-LX Control System	J-300	✅
Jacuzzi J-XL Control System	J-300	✅

Specifically Designed For:

• ✅ Jacuzzi J-300 Series hot tubs with 2-pump configuration
• ✅ Systems currently using 6600-383 topside

How to Verify Compatibility:

📍 Check your existing topside for part number (look for 6600-383)

📍 Confirm your spa uses a J-LX or J-XL control system

📍 Verify your spa is a J-300 series 2-pump model

📍 Check connector type matches (Molex style plug)

📍 Contact Parts4Tubs if unsure about compatibility

⚠️ Important: Topside controls are system-specific. Installing an incompatible topside will not work and may display error codes. This panel is designed exclusively for Jacuzzi J-LX and J-XL control systems.

🔘 Button Functions & Controls

Button	Function
Clear Ray	Controls Jacuzzi’s UV water purification system
Program	Access programming and settings menu
Light (×2)	Spa lighting control (two light buttons for dual zone or mode selection)
Minus (-)	Decrease temperature setting
Plus (+)	Increase temperature setting
Jet1	Controls primary pump/jet system
Jet2	Controls secondary pump/jet system

LCD Display Information:

Display Element	Shows
Temperature	Current and set water temperature
Mode Indicators	Heating, filtering, and system status
Error Codes	System diagnostics from spa pack
Clear Ray Status	UV system operation indicator

🛠️ Installation Guide

Before Installation:

⚠️ Disconnect power to spa at the isolator/breaker before any work

⚠️ Verify compatibility with your Jacuzzi J-LX or J-XL control system

⚠️ Confirm your current topside is model 6600-383 or equivalent

⚠️ Check cable length is sufficient for your installation

Installation Steps:

1. Turn off power at the isolator/breaker – wait 30 seconds
2. Remove the old topside panel from the spa cabinet
3. Carefully disconnect the Molex style cable from the spa pack
4. Connect the new topside’s Molex plug to the same port on the spa pack
5. Mount the new topside panel in position
6. Restore power and allow system to initialise
7. Test all button functions and verify LCD display operation

Mounting:

Requirement	Specification
Mounting Type	Please refer to manufacturer documentation
Cutout Size	Please refer to manufacturer documentation
Gasket/Seal	Please refer to manufacturer documentation

⚠️ Professional installation recommended if you are unfamiliar with spa electronics or electrical safety procedures.

🔌 Wiring & Connection

Connector Information:

Specification	Detail
Connector Type	Molex Style Plug
Cable Length	Please refer to manufacturer documentation
Extension Available	Contact Parts4Tubs for options

Connection Notes:

This topside connects to the J-LX or J-XL control system via a Molex style plug. The connection point is located on your spa’s control box.

⚠️ Never force the connector. The Molex plug should connect smoothly. If it doesn’t fit, verify you have the correct topside for your control system.

⚠️ Ensure secure connection. A loose connection can cause intermittent display issues or communication errors.

🔍 Troubleshooting

Common Issues:

Problem	Possible Cause	Solution
Blank LCD display	No power / loose connection	Check power supply and reseat Molex connector
Error codes displayed	Various system issues	Refer to J-LX/J-XL spa pack manual for error meanings
Buttons unresponsive	Connection issue / moisture ingress	Check connection; inspect for water damage
Partial display segments	LCD fault	Replacement may be needed
Jet buttons not working	Pump issue (not topside)	Check pump operation and spa pack
Clear Ray button inactive	UV system not installed/disabled	Check Clear Ray system connection

Error Codes:

Error codes are determined by the J-LX or J-XL spa pack, not the topside panel itself. The topside simply displays the error code generated by your control system.

📍 Refer to your Jacuzzi spa pack manual for specific error code meanings and solutions.

📍 Common codes may indicate issues with temperature sensors, flow, or heating elements.

🛠️ Maintenance & Care

Routine Care:

Task	Frequency
Wipe with soft, damp cloth	Weekly
Check button response	Monthly
Inspect Molex connection	Annually
Check LCD clarity	Annually

DO NOT:

• ❌ Use abrasive cleaners or scouring pads
• ❌ Spray water directly onto the panel
• ❌ Use solvent-based or chemical cleaners
• ❌ Press buttons with sharp objects
• ❌ Submerge the topside in water

LCD Care:

To maintain display clarity, gently clean with a soft microfibre cloth. Avoid pressing hard on the LCD screen.

🎯 Ideal Applications

Application	Suitability
♨️ Replacement for faulty 6600-383 topside	✅ Ideal – direct replacement
♨️ Jacuzzi J-300 series 2-pump spas	✅ Designed specifically for these models
♨️ J-LX control system spas	✅ Fully compatible
♨️ J-XL control system spas	✅ Fully compatible
♨️ Spas with Clear Ray UV system	✅ Integrated Clear Ray button

Common Replacement Scenarios:

• Cracked or damaged LCD display
• Unresponsive or sticky buttons
• Water damage to existing topside
• Faded or illegible display
• Intermittent display or button issues
• Upgrading from a non-functional unit

❓ Frequently Asked Questions

Q: How do I know if this topside is compatible with my Jacuzzi spa?

A: This topside is designed for Jacuzzi J-300 series spas with 2-pump configurations using J-LX or J-XL control systems. Check your existing topside for part number 6600-383, or verify your spa pack model. Contact Parts4Tubs if you need assistance confirming compatibility.

Q: What does the Clear Ray button do?

A: The Clear Ray button controls Jacuzzi’s UV water purification system. If your spa is equipped with Clear Ray technology, this button activates and manages the UV sanitisation function.

Q: Why are there two Light buttons?

A: The dual light buttons allow control of separate lighting zones or lighting modes, depending on your spa’s configuration.

Q: What connector type does this topside use?

A: This topside uses a Molex style plug connector, which is standard for Jacuzzi J-LX and J-XL control systems.

Q: Will this display error codes?

A: Yes, the LCD display shows error codes generated by your J-LX or J-XL spa pack. Refer to your spa pack manual for specific error code meanings.

Q: Can I install this myself?

A: If you’re comfortable working with spa electronics and can safely isolate power at the breaker, DIY installation is possible. The Molex connector provides straightforward plug-and-play connection. However, professional installation is recommended if you’re unfamiliar with spa electrical systems.

Q: What is the cable length?

A: Please refer to manufacturer documentation or contact Parts4Tubs for cable length specifications.

Q: Does this come with an overlay?

A: This is a complete electronic topside unit. Please refer to manufacturer documentation regarding overlay specifications.

Q: What warranty is included?

A: Please contact Parts4Tubs for current warranty terms and conditions.

🏆 Why Choose the Jacuzzi J-300 Series LCD Topside

• ✅ Genuine Jacuzzi OEM – Authentic manufacturer component, not aftermarket
• ✅ Direct 6600-383 Replacement – Designed to replace this specific part number
• ✅ LCD Display – Clear, easy-to-read interface for all spa functions
• ✅ Complete 8-Button Control – Full functionality including dual pump and Clear Ray
• ✅ J-LX & J-XL Compatible – Verified compatibility with these Jacuzzi control systems
• ✅ Durable Construction – Built to withstand spa environments

🤝 Why Buy from Parts4Tubs

• ✅ UK-based company with local support
• ✅ Fast UK delivery
• ✅ Expert advice from spa specialists
• ✅ Compatibility assistance available
• ✅ Full warranty support
• ✅ Easy returns within 30 days
• ✅ Genuine OEM components

✨ Summary

The Jacuzzi J-300 Series LCD Topside is a genuine OEM replacement panel for Jacuzzi spas equipped with J-LX and J-XL control systems. Featuring an LCD display and 8-button configuration including Clear Ray, Program, dual Light, temperature adjustment, and dual jet pump controls, this complete electronic topside provides full functionality for your J-300 series 2-pump spa. As a direct replacement for part number 6600-383, it offers plug-and-play installation via Molex connector. Order today from Parts4Tubs for fast UK delivery and expert support.