🛁 Sundance® / Jacuzzi® 680 & 780 Series Replacement Circuit Board — 6600-726 — LX-15 — With Circulation Pump

OEM replacement circuit board for Sundance® 680 and 780 Series and Jacuzzi® J-300 / J-200 Series spas equipped with a circulation pump — LX-15 system, Series 3 chip — replaces 6600-288, 6600-088, 6000-167, and 6600-046.

⚠️ IMPORTANT — PLEASE READ BEFORE ORDERING

• This board requires a circulation pump. The 6600-726 only operates with a dedicated circulation pump (LX-15). If your spa does not have a circulation pump, do not order this board — you need board 6600-720 (formerly 6600-287) instead.
• Series 3 chip confirmation required. Check the EPROM chip on your existing board — it should have a software revision number that begins with a “3” (such as Rev 3.56, 3.57, 3.61). If your existing chip begins with a “5” (such as Rev 5.54), you have a 6600-287 board (non-circ pump version) and should order 6600-720 instead.
• 6600-288 has been phased out. The 6600-726 is the current OEM replacement for the discontinued 6600-288 (Rev 3.57+) and older boards 6600-088, 6000-167, and 6600-046. The 6600-726 is backwards compatible and ships with the latest EPROM revision (3.61+).
• Jumper configuration required. After installation, jumpers must be set correctly for your specific spa configuration. Refer to the wiring schematic and documentation included with the board.

📋 Product Overview

The 6600-726 is the current OEM circuit board for Sundance® 680 and 780 Series hot tubs and Jacuzzi® J-200 and J-300 Series spas equipped with a circulation pump. Manufactured by Sundance® / Jacuzzi®, it operates on the LX-15 control platform. This board is the updated replacement for the discontinued 6600-288 (Rev 3.57+) and also supersedes older boards 6600-088, 6000-167, and 6600-046 — all of which used the same Series 3 chip with circulation pump logic.

The board ships with the latest EPROM revision (3.61+) and is 100% compatible with systems that previously used any of the above part numbers. Four jumpers are present for configuration of amperage, pump count, and temperature display units.

⭐ Key Features

✅ OEM replacement circuit board — manufactured by Sundance® / Jacuzzi®
✅ Part Number: 6600-726 — current version
✅ System: LX-15
✅ Series 3 chip — ships with latest EPROM revision 3.61+
✅ Replaces discontinued 6600-288 (Rev 3.57+) and also 6600-088, 6000-167, 6600-046
✅ For Sundance® 680 and 780 Series and Jacuzzi® J-200 and J-300 Series with circ pump
✅ 4-jumper configuration for amperage, pump count, and temperature display
✅ Factory-new — never installed
✅ 1-year limited manufacturer’s warranty

⚠️ This board requires a circulation pump. For spas without a circ pump, use 6600-720.

🔩 Technical Specifications

Specification	Value
Part Number (Current)	6600-726
Replaced / Superseded	6600-288, 6600-088, 6000-167, 6600-046
System	LX-15
Chip Series	Series 3 (EPROM begins with “3”)
Current EPROM Revision	3.61+
Circulation Pump	Required — board will not operate without one
Alt. Board (No Circ Pump)	6600-720 (formerly 6600-287)
Board Type	New — OEM
Returns	Non-returnable (electrical item — final sale)
Warranty	1-year limited manufacturer’s warranty

⚠️ For voltage, amperage, breaker size, and heater specifications, refer to the wiring diagram and rating label on the back of the spa pack cover.

🔗 Compatibility Guide

⚠️ Critical Pre-Order Checklist

Before ordering, confirm ALL of the following:

1. Your spa has a dedicated circulation pump (LX-15)
2. Your existing board’s EPROM chip revision begins with “3” (e.g., Rev 3.56, 3.57, 3.61)
3. Your existing board is one of: 6600-288, 6600-088, 6600-726, 6000-167, 6600-046
4. Your spa model is in the compatibility list below

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Compatible Sundance® Spa Models:

Year	Model
2003–2006	Palermo, Bahia, Cayman (with circ pump)
2005–2006	780 Series: Palermo, Bahia, Cayman
2007+	680 Hartford® (with circ pump)
2007+	680 Hawthorne® (with circ pump)
2007+	780 Hamilton (1-pump, with circ pump)
2007+	780 Chelsee® (1-pump, with circ pump)
2007+	780 Certa (with circ pump)
2007+	780 Camden® (1-pump, with circ pump)
2008+	680 Burlington® (1-pump, with circ pump)
2014+	Constance, Victoria
2014–03/2017	Montclair, Hamilton, Chelsee, Certa

Compatible Sweetwater Spa Models:

Year	Model
2003–2005	Palermo, Bahia, Cayman (Sweetwater Series)

Compatible Jacuzzi® Spa Models (LED display + circulation pump + 240V):

Year	Model
2002–2003	J-325
2002+	J-335
2002–2006	J-345
2005–2006	J-325
2007	J-325 (240V model)
2007+	J-335, J-345, J-355, J-365
2008+	J-375
Various	J-320, J-330, J-340
Various	J-200 Series with LED display and circ pump

⚠️ The 6600-726 is compatible with nearly all J-300 and J-200 Jacuzzi® models that have an LED display, a circulation pump, and 240V power.

Replaces These Part Numbers:

Part Number	Notes
6600-726	Current OEM PN — this board
6600-288	Discontinued — replaced by 6600-726
6600-088	Older version — replaced by 6600-288 → 6600-726
6000-167	Jacuzzi® part number — replaced by 6600-726
6600-046	Older board with circ pump EPROM

Compatible Control Panels (partial list): 6600-322, 6600-633, 6600-832, and other compatible Sundance® / Jacuzzi® topside panels.

⚙️ Jumper Configuration

After installing the board, set the jumpers to match your spa’s configuration. Always refer to the wiring schematic on the back of the spa pack cover and the documentation included with the board for the definitive settings for your specific spa.

Jumper	Setting	Function
Jumper 2	1 Pin = 15A	Amperage configuration
Jumper 2	2 Pins = 50A	Amperage configuration
Jumper 4	1 Pin = 1 pump	Pump count
Jumper 4	2 Pins = 2 pumps	Pump count
Jumper 6	Used with Jumper 2	Additional configuration
Jumper 8	1 Pin = Fahrenheit	Temperature display unit
Jumper 8	2 Pins = Celsius	Temperature display unit

Circulation Pump Programming (after installation): Press and hold Jet 1 and the minus (–) key for 3 seconds. The display will cycle through c1, c2, c3, or c4. Each setting represents a 4-hour increment (c1 = 4 hrs, c2 = 8 hrs, c3 = 12 hrs, c4 = 16 hrs). Press plus (+) or minus (–) to select, then press Jet 1 to confirm.

🛠️ Installation Requirements

Pre-Installation Checklist:

• [ ] Confirm spa has a dedicated circulation pump (LX-15)
• [ ] Confirm existing board’s EPROM chip begins with “3” (e.g., Rev 3.57, 3.61)
• [ ] Confirm existing board is 6600-288, 6600-088, 6000-167, or 6600-046
• [ ] Photograph all existing wiring and jumper positions before removal
• [ ] Obtain wiring schematic from back of spa pack cover
• [ ] Disconnect all power at GFCI breaker or service disconnect
• [ ] Allow capacitors to discharge before handling board

Electrical Requirements:

Requirement	Specification
GFCI	Class A GFCI required — NEC Article 680
Ground & Bonding	Required — NEC Article 680
Dedicated Circuit	Required
Disconnect Box	Within line of sight of spa, at least 5 ft away
Voltage	Refer to spa pack wiring diagram and rating label
Wire Type	Copper conductors only

⚠️ Safety Warnings

• ⚠️ ALWAYS disconnect all power before circuit board work
• ⚠️ Licensed electrician installation required; NEC Article 680 compliance mandatory
• ⚠️ GFCI required; grounding and bonding required per NEC Article 680
• ⚠️ This board REQUIRES a circulation pump — do not use if your spa has no circ pump
• ⚠️ Series 3 chip only — if your existing chip begins with “5,” order 6600-720 instead
• ⚠️ Jumper configuration required after installation — verify settings before powering up
• ⚠️ Damage from incorrect installation is NOT covered under warranty

❓ Frequently Asked Questions

Q: How do I know if I need the 6600-726 or the 6600-720? A: Check the EPROM chip number on your existing circuit board. If it begins with a “3” (e.g., Rev 3.56, 3.57, 3.61) and your spa has a circulation pump, you need the 6600-726. If it begins with a “5” (e.g., Rev 5.54), your spa does not use a circulation pump and you need the 6600-720 (formerly 6600-287) instead.

Q: My board shows 6600-288 — is 6600-726 the correct replacement? A: Yes. The 6600-726 is the current OEM version that directly replaces the discontinued 6600-288. It ships with EPROM revision 3.61+ and is 100% compatible with all systems that previously used 6600-288, 6600-088, 6000-167, or 6600-046.

Q: My board shows 6600-087 / 6600-287 — do I need this board? A: Only if your existing board uses a Series 3 chip (beginning with “3”) and your spa has a circulation pump. If your 6600-087 board has an EPROM chip beginning with “5” (such as Rev 5.54), you actually have a 6600-287 (non-circ pump) board — in that case, order 6600-720 instead of this one.

Q: Can this board be used in Jacuzzi® J-300 series spas? A: Yes — the 6600-726 fits nearly all J-300 and J-200 Jacuzzi® models that have an LED display, a dedicated circulation pump, and 240V power. See the compatibility table above for specific models.

Q: What warranty is included? A: 1-year limited manufacturer’s warranty. Circuit boards are non-returnable — all electrical items are final sale. Warranty covers manufacturer defects; damage from incorrect installation is not covered.

✅ Why Choose the 6600-726 Sundance® / Jacuzzi® Circuit Board

✅ Current OEM replacement — supersedes discontinued 6600-288 and all earlier versions
✅ Ships with latest EPROM Rev 3.61+ — most up-to-date firmware available
✅ Broad model coverage — Sundance® 680 / 780, Sweetwater, and Jacuzzi® J-200 / J-300
✅ 4-jumper configuration — adapts to 1-pump or 2-pump configurations
✅ Factory-new — never installed
✅ 1-year limited manufacturer’s warranty

🤝 Why Buy from Parts4Tubs

✅ Fast US shipping
✅ Chip and compatibility verification — contact us before ordering if unsure
✅ Competitive pricing

♨️ Summary

The 6600-726 is the current OEM circuit board for Sundance® 680 and 780 Series and Jacuzzi® J-200 / J-300 Series spas with a dedicated circulation pump. It operates on the LX-15 platform with a Series 3 EPROM (Rev 3.61+) and directly replaces the discontinued 6600-288 as well as older boards 6600-088, 6000-167, and 6600-046. This board requires a circulation pump — for spas without one, order 6600-720 instead. Jumper configuration is required after installation. Non-returnable; 1-year limited manufacturer’s warranty.

Finding and identifying a replacement Hot Tub Circuit Board (PCB)

If you are looking to replace a failed PCB on your Hot Tub’s spa pack, then quite often identifying the part that you need can be the hardest thing.

Firstly, you are looking for a model number on the actual circuit board itself. Having the model or serial of your hot tub is not going to help at this point, you need to find the number on the PCB itself.

Now, with certain brands of PCB, the number of the replacement PCB that you need is not going to match identically the one you are replacing. Why is that I hear you ask?

Well, normally, it is an updated version. This means that it might have updated firmware on the PCB or be a later revision. Normally, this means that the part number would be slightly different. This is usually indicated with a “12345678 -x” at the end of that part number where x indicated a firmware revision.

In some cases, there will be some following letters on the part number of the circuit board, “12345678 -x MAS” this can indicate that the PCB was used for an OEM meaning it was produced for a certain hot tub manufacturer and the letters identify the manufacturer.

This means if you source an original PCB, it will not have the letters, but will in most cases work just fine.

It can be confusing I know!

What if you can’t find a model number?

If you can’t find a model number on the PCB itself, then you need to look for a model number on the spa pack. Normally, there is a sticker on the outside of the spa pack that tells you the current ratings and input voltages etc and this will have a model number.

In general, most spa packs in the USA are manufactured by Balboa, Hydro-Quip, ACC or Gecko. I know I am generalising here, but if you have a spa pack that has the brand of your hot tub on, it will be an OEM so the key is identifying who made the original box.

From there, you can normally find an original PCB that you will be able to switch out.

For example, the Balboa VS (value series) is a very popular spa pack that has been used by multiple hot tub manufacturers under their own brand names. Whatever they have called it, strip it back and it is still a Balboa VS.

Visual Inspection

One of the most important things you can do when you are looking for a replacement is to visually inspect the PCB that you have versus the picture online of the replacement you are considering. They need to look the same even if there are the differences in firmware revisions or OEM part numbers, you should be visually replacing a PCB that looks like the one you have.

Configuring a replacement Hot Tub Circuit Board (PCB)

When you get a new PCB, you are more than likely going to need to configure it. Most PCBs have a number of different modes and setups that the can operate in. For this, you will need to manual or spec sheet to guide you.

For things like DIP switches, most of the time you can copy the settings from your original circuit board. You are looking for things like setting the voltage as a lot of PCBs can be configured to run on both 115V and 230V.

You may need to move jumpers or even wires to configure voltages – the key here is that you read the schematic and don’t expect the PCB to just work out of the box – it usually doesn’t.

Troubleshooting a Hot Tub Circuit Board (PCB)

Here are some common things you will see when you replace a PCB on a hot tub.

You press the buttons on the topside control and they don’t control the right parts (pumps or blower etc) – this is a mode configuration thing and you will either need to change some DIP switches on the PCB or an internal or low level programming mode on the topside control. Check the manual for how to do this.

You turn on the hot tub and it trips the breaker – it is not common for a new PCB to fail out of the box (I have not seen one yet!) However, a common mistake is that the voltage has not been set correctly. If it is set for 115V and then you try and turn it on, the current draw will be a lot more (twice) than expected and the breaker will trip.

To check this, unplug all of your kit – heater, pumps, blower and then turn on the PCB. If it trips with nothing plugged in, usually the voltage is incorrectly set and what is happening is that live current is being sent to the ground – because you have 4 wires into the PCB rather than 3. Current on the ground loop causes the trip. Check the settings to make sure it is configures for 230V.

It might not trip until you physically turn on a pump or a blower. As mentioned, if the pack is set to 115V and your pump is meant for 230V, it will draw twice the current at half the voltage and trip your breaker. Check the manual for info on how to set the voltage.