💡 Sundance® / Jacuzzi® 6600-728 880 / J-400 LCD Series Spa Circuit Board (2-Pump, 2 × 1-Speed, with PermaClear® & Circulation Pump)

The current OEM replacement PCB for 2005–2015 Sundance® 880 Series and 2006–Mid 12/2009 Jacuzzi® J-400 / J-300 LCD Series hot tubs with PermaClear® ozone sanitation, dedicated circulation pump, and TWO single-speed jet pumps.

📋 Product Overview

The Sundance® / Jacuzzi® 6600-728 is the current OEM main circuit board for Sundance® 880 Series and Jacuzzi® J-400 LCD Series hot tubs configured with two single-speed jet pumps (Pump 1 = 1-Speed, Pump 2 = 1-Speed), a dedicated 24-hour circulation pump, and PermaClear® ozone sanitation. This board is the factory-designated current replacement for a three-generation chain of discontinued OEM boards — 6600-098 (original, 2005 – February 2008, EPROM Rev 9.51A), 6600-161 (February 2008 – April 2009, EPROM Rev 9.51B or IC Processor 2.0A), and 6600-180 (intermediate revision) — consolidating coverage into one current OEM part with added surface-mount heater terminals for improved connection reliability.

Coverage spans 2005 – 2015 Sundance® 880 Series (Altamar®, Cameo®, Capri®, Marin®, Optima®, Majesta® — with the 2-pump single-speed configuration), plus Jacuzzi® J-400 Series (J-460, J-465, J-470, J-480) from 2006 through Mid 12/2009, and Jacuzzi® J-300 LCD Series 2-pump 1-speed configurations from 2006–2009. The board features comprehensive JP19 and JP9 jumper banks for regional (°F/°C, 50/60 Hz, LED/incandescent) and system logic configuration (40 A / 50 A / 60 A heater logic, Pump 2 enable, trouble log, ILOC).

⚠️ This board is for TWO 1-SPEED PUMPS only. If your spa has a 2-speed Pump 1 (and 1-speed Pump 2), you need the 6600-730 instead — not this board. ⚠️ This is the 880 LCD platform board. For 880 NT System spas (2008+ Optima®/Cameo®, 2009+ Majesta®/Altamar®/Marin®/Capri®) — which use a different topside family — use the 6600-390 (2-pump) or 6600-392 (3-pump Maxxus®/Aspen®) instead. Read the Compatibility Guide section below carefully before ordering. ⚠️ Verify your spa has the waterfall and Hi-Flow circulation pump. The 6600-728 covers 2005–04/2009 Sundance® 880 Series spas after the waterfall and Hi-Flow circ were introduced — earlier 880 Series configurations may use a different board.

✨ Key Features

• ✅ Current OEM Sundance® / Jacuzzi® replacement – factory-new, current production revision
• ✅ Consolidates THREE discontinued predecessor boards (6600-098, 6600-161, 6600-180) into a single current OEM part
• ✅ Surface-mount heater terminals on the current revision for improved long-term heater connection reliability
• ✅ Same physical mounting footprint as predecessor boards — direct drop-in replacement
• ✅ Comprehensive coverage – 2005–2015 Sundance® 880 Series + 2006–Mid 12/2009 Jacuzzi® J-400 + 2006–2009 Jacuzzi® J-300 LCD
• ✅ 2 jet-pump outputs (both 1-speed) – for Pump 1 = 1-Speed, Pump 2 = 1-Speed systems
• ✅ Dedicated 24-hour circulation pump control – PermaClear® Hi-Flow circ pump operation
• ✅ PermaClear® ozone support – drives the factory-installed PermaClear® sanitation system
• ✅ Dual jumper banks (JP19 + JP9) – full regional and system-logic configuration
• ✅ 60 Hz / 50 Hz selectable via JP19-3
• ✅ °F / °C selectable via JP19-1
• ✅ LED or incandescent lighting selectable via JP19-5
• ✅ Heater logic selectable (40 A / 50 A / 60 A) via JP9-7 and JP9-11
• ✅ Built-in trouble log (JP9-1) and ILOC support (JP9-3)
• ✅ Non-returnable – spa circuit boards are final sale
• ✅ Covered by manufacturer’s limited warranty

🔧 Technical Specifications

Specification	Value
OEM Part Number	6600-728
Also Listed As	SD6600-728, SUN6600-728
Platform	Sundance® 880 / Jacuzzi® J-400 / J-300 LCD (60 Hz US / North American)
Pump Configuration	2 × 1-Speed Jet Pumps (Pump 1 = 1-Speed, Pump 2 = 1-Speed) + 24-hour circulation pump
Sanitation System	PermaClear® ozone (supported — required)
Heater Terminals	Surface-mount (current revision)
Production Years Covered	2005–2015 Sundance® 880 Series; 2006–Mid 12/2009 Jacuzzi® J-400; 2006–2009 Jacuzzi® J-300 LCD
Replaces (Discontinued)	6600-098 (original, EPROM Rev 9.51A), 6600-161 (EPROM Rev 9.51B or IC Processor 2.0A), 6600-180, 382840
Chip/Processor Architecture	Legacy 6600-098 used EPROM 9.51A chip; 6600-161 transitioned between EPROM 9.51B (Dallas Chip) and IC Processor 2.0A (Microprocessor) in early February 2011; current 6600-728 continues the current-revision architecture
Companion Board (2-Speed Pump 1)	6600-730 (850/880 LCD Series, Pump 1 = 2-Speed, Pump 2 = 1-Speed)
Companion Board (880 NT 2-pump)	6600-390 (different platform — 2008+ 880 NT)
Companion Board (880 NT 3-pump)	6600-392 (Maxxus®/Aspen®)
Compatible Topside (Sundance)	6600-860 (11-button LCD trapezoid, 850/880 LCD platform)
Compatible Topside (Jacuzzi)	Jacuzzi® 20318-001
Matching Temperature Sensor	6600-167 (Box End Connectors)
Matching Hi-Limit Sensor	6600-110
Non-Returnable	✅ Yes — final sale
Warranty	Manufacturer’s limited warranty

📌 Electrical supply voltage is spa-model-specific. Sundance® 880 Series and Jacuzzi® J-400 / J-300 LCD spas typically ship configured for 240 V / 60 Hz service in the US market. The 6600-728 itself is 50/60 Hz jumper-selectable via JP19-3 for potential export configurations, but always verify against your spa’s data plate before connecting power. No universal voltage/amperage rating is published for the bare 6600-728 PCB by the manufacturer — the configuration depends on the specific spa model’s installed heater, pumps, and service supply.

🔗 Compatibility Guide

Covered Sundance® 880 Series Models (2 × 1-Speed Pumps)

Model	Years	Notes
♨️ Altamar®	2005 – 2015 (2-pump 1-speed 880 LCD configuration)	Post-waterfall, Hi-Flow circ required
♨️ Cameo®	2005 – 2015 (2-pump 1-speed 880 LCD configuration)	Post-waterfall, Hi-Flow circ required
♨️ Capri®	2005 – April 2009 (2-pump 1-speed 880 LCD configuration)	Post-waterfall, Hi-Flow circ required
♨️ Marin®	2007 – 2015 (2-pump 1-speed 880 LCD configuration)	Post-waterfall, Hi-Flow circ required
♨️ Optima®	2005 – 2015 (2-pump 1-speed 880 LCD configuration)	Post-waterfall, Hi-Flow circ required
♨️ Majesta®	2005 – April 2009 (2-pump 1-speed 880 LCD configuration)	Post-waterfall, Hi-Flow circ required

Covered Jacuzzi® J-400 LCD Series Models (2 × 1-Speed Pumps)

Model	Years	Notes
♨️ J-460	2006 – Mid 12/2009	2-pump 1-speed configuration
♨️ J-465	2006 – Mid 12/2009	2-pump 1-speed configuration
♨️ J-470	2006 – Mid 12/2009	2-pump 1-speed configuration
♨️ J-480	2006 – Mid 12/2009	2-pump 1-speed configuration

Covered Jacuzzi® J-300 LCD Series Models (2 × 1-Speed Pumps)

Platform	Years	Notes
♨️ J-300 LCD Series 2-pump 1-speed	2006 – 2009	J-300 LCD Display spas with two single-speed jet pumps

Boards Replaced by the 6600-728

Discontinued OEM	Production Era	Chip/Processor	Status
6600-098	2005 – February 2008 (original)	EPROM Rev 9.51A (Dallas Chip)	Discontinued → 6600-728
6600-161	February 2008 – April 2009	EPROM Rev 9.51B OR IC Processor 2.0A (transition in early February 2011)	Discontinued → 6600-728
6600-180	Intermediate revision	—	Discontinued → 6600-728
Also replaces	382840	Distributor alternate PN reference	Current → 6600-728

💡 EPROM vs IC Processor transition note: 2011-era boards in the 6600-161 family could have either an EPROM chip or an IC Processor. Sundance® transitioned between the two memory architectures in early February 2011, and both predecessor board types are fully interchangeable with the current 6600-728. Visually inspect your old board to understand what you have, but the 6600-728 replaces both.

Companion Boards (Same LCD Platform — Different Pump Configurations)

Part Number	Pump Configuration	Notes
6600-728 (THIS BOARD)	Pump 1 = 1-Speed, Pump 2 = 1-Speed	880 LCD 2 × 1-speed
6600-730	Pump 1 = 2-Speed, Pump 2 = 1-Speed	850 / J-300 LCD 2-speed P1 variant

Compatible Topside Panels

Topside PN	Platform	Description
Sundance® 6600-860	880 LCD Series	11-button trapezoid LCD topside — used across 2001+ 850/880 LCD spas
Jacuzzi® 20318-001	Jacuzzi® J-400 / J-300 LCD	Jacuzzi®-branded LCD topside for J-400 and J-300 LCD Series spas

Companion Sensor / Component Parts

Component	Part Number	Notes
Temperature Sensor	6600-167	Box End Connectors, 800 Series (includes O-ring 6540-228)
Hi-Limit Sensor	6600-110	Temp/Hi Limit Sensor with Box Ends
Circulation Pump (Hi-Flow)	6500-907 or 6000-907	Required for post-waterfall 2005–04/2009 Sundance® 880 Series installations

NOT Compatible — Use a Different Board

Your spa	Correct Replacement
❌ Pump 1 is 2-speed (Pump 2 = 1-speed), 850 or J-300 LCD platform	6600-730
❌ 2008+ Sundance® 880 NT System 2-pump (uses 6600-854 / 6600-882 / 6600-425 topside, NOT 6600-860)	6600-390
❌ 2008+ Sundance® 880 NT System 3-pump Maxxus® / Aspen®	6600-392
❌ Pre-2005 Sundance® 850 Series (pre-waterfall)	Different legacy board — contact Parts4Tubs for identification
❌ 850 Series Maxxus® 3-Pump (per Amazon incompatibility note)	6600-094 (850 NT Maxxus 3-pump, 2002–2004)
❌ Jacuzzi® J-485 3-pump (J-400 Series 3-pump variant)	Different J-400 Series board required
❌ Jacuzzi® J-400 LCD Mid 12/2009+ (post-platform change)	J-1000 load box or platform-specific successor
❌ 2014–2015 Jacuzzi® J-300 LED Series (distinct from J-300 LCD)	6600-297 (2-pump) or 6600-296 (1-pump)
❌ 2016+ J-300 Series	6600-784 (2-pump) or 6600-786 (1-pump)
❌ Sundance® 680 / 780 Series (LX-15 / Sweetwater platform)	6600-720 (no circ) or 6600-726 (with circ)

🎛️ Board Functions & Controls

Jumper Bank JP19 — Regional / Display Configuration

Jumper	Function	ON	OFF
JP19-1	Temperature display	Celsius (°C)	Fahrenheit (°F) — US default
JP19-3	Supply frequency	50 Hz (Export)	60 Hz (US / North American default)
JP19-5	Lighting type	LED	Incandescent
JP19-7	NOT USED	—	—
JP19-9	NOT USED	—	—
JP19-11	NOT USED	—	—

Jumper Bank JP9 — System Logic Configuration

Jumper	Function	ON	OFF
JP9-1	Trouble Log	Enabled	Disabled
JP9-3	ILOC (Interlock)	Enabled	Disabled
JP9-5	NOT USED	—	—
JP9-7	60 A Logic	Allows 2 Pumps on with Heater	OFF = 50 A Logic (forces Heater OFF when more than 1 Pump is ON)
JP9-9	Pump 2 enable (on 6600-728 and 6600-730)	Pump 2 enabled	Pump 2 disabled
JP9-11	40 A Logic	Forces Heater OFF with any Pump in Hi	Disabled
JP9-13	Blower + Pump logic	Only 1 Pump with Blower operates at a time	Blower, Pump 1, Pump 2 can operate simultaneously
JP9-15	Factory Reset	Recall All Factory Settings (momentary use only)	Must remain OFF during normal operation

📌 Important JP9-7 / JP9-11 note: Your spa’s electrical service size determines which of these heater-logic jumpers should be set. Three service sizes have different behaviors:

• 60 A service (JP9-7 = ON, JP9-11 = OFF): Allows 2 pumps on with heater (most powerful configuration)
• 50 A service (JP9-7 = OFF, JP9-11 = OFF): Forces heater OFF when more than 1 pump is ON
• 40 A service (JP9-7 = OFF, JP9-11 = ON): Forces heater OFF with ANY pump in high speed

Mis-setting these jumpers can cause nuisance breaker tripping or heater inefficiency. Verify your spa’s data plate service rating before setting JP9-7 and JP9-11.

📌 JP9-15 warning: The factory reset jumper is for momentary use only during initial setup or troubleshooting. Leaving it in the ON position during normal operation will cause the board to repeatedly reload factory settings on every power cycle. Always return this jumper to OFF after use.

📌 JP9-9 shared-jumper note: Per the documented jumper reference, JP9-9 enables “Pump 2 on -728/-730 pcb’s and Pump 3 on -392 pcb”. On the 6600-728 (this board), JP9-9 ON enables Pump 2. This convention is shared across the 6600-728, 6600-730, and 6600-392 boards with different pump-number semantics per board.

Controlled Outputs

Output	Function
Pump 1	Primary jet pump — 1-speed (per 880 LCD / J-400 factory configuration)
Pump 2	Secondary jet pump — 1-speed (enabled via JP9-9)
Circulation Pump	PermaClear® Hi-Flow 24-hour circ pump
Heater	Flow-through heater (per spa’s factory configuration, logic-switched per JP9-7/JP9-11)
PermaClear® Ozone	Supported
Blower	Supported (interacts with Pump logic per JP9-13)
Spa Lighting	LED or incandescent (selectable via JP19-5)
Topside Interface	Sundance® 6600-860 or Jacuzzi® 20318-001

🛠️ Installation Requirements

Pre-Installation Checklist

• [ ] Confirm your spa is a Sundance® 880 LCD Series (Altamar®, Cameo®, Capri®, Marin®, Optima®, Majesta® 2005–2015) OR Jacuzzi® J-460/J-465/J-470/J-480 LCD (2006–Mid 12/2009) OR Jacuzzi® J-300 LCD Series 2-pump 1-speed (2006–2009)
• [ ] Confirm your spa has a 2-pump configuration with BOTH pumps being 1-speed. If Pump 1 is 2-speed, you need the 6600-730 instead.
• [ ] Confirm your spa has PermaClear® ozone sanitation
• [ ] Confirm your spa has a dedicated 24-hour Hi-Flow circulation pump (6500-907 or 6000-907 for Sundance® 2005–04/2009 post-waterfall)
• [ ] Confirm your spa was manufactured AFTER the waterfall / Hi-Flow circ pump transition for Sundance® 880 spas
• [ ] Note your existing board’s part number (6600-098, 6600-161, 6600-180, or 6600-728)
• [ ] Note your existing topside panel (Sundance® 6600-860 or Jacuzzi® 20318-001)
• [ ] Identify your spa’s electrical service rating (40 A / 50 A / 60 A) — this determines JP9-7 / JP9-11 jumper settings
• [ ] Disconnect all power at the main breaker and the external GFCI disconnect box
• [ ] Wait at least 5 minutes for capacitors to fully discharge
• [ ] Photograph every wire, harness, and connector position before removing the old board
• [ ] Photograph both jumper banks (JP19 and JP9) on the old board if visible — this preserves your current configuration for transfer to the new board
• [ ] Inspect the temperature sensor (6600-167), hi-limit sensor (6600-110), and circulation pump for wear

Electrical Requirements (US)

Requirement	Specification
Supply Voltage	Per spa data plate (typically 240 V / 60 Hz for US 880 LCD / J-400 models)
Frequency	60 Hz (US standard — verify JP19-3 is OFF)
GFCI Protection	Required (NEC Article 680)
Ground / Bonding	Mandatory equipment grounding and bonding per NEC Article 680
Dedicated Circuit	Required
Disconnect Box	Required within line of sight of spa (per NEC)
Wire Gauge	Per spa data plate and NEC ampacity tables

💡 Installation tip: The current 6600-728 revision has surface-mount heater terminals — a more reliable connection than the spade terminals on some older 6600-098 / 6600-161 / 6600-180 revisions. When transferring heater wires, confirm your existing heater’s terminal configuration matches the new board’s terminals before making final connections.

⚠️ Safety Warnings

Electrical Safety

• ⚠️ ALWAYS disconnect power at both the main breaker and the exterior GFCI disconnect box before any work
• ⚠️ Licensed electrician only — NEC Article 680 and most US local codes require it
• ⚠️ Verify GFCI protection is installed and tested
• ⚠️ Equipment grounding and bonding must comply with NEC Article 680
• ⚠️ Never operate the spa with the electrical compartment cover removed

Jumper Configuration Safety

• ⚠️ Verify JP9-7 / JP9-11 heater logic matches your spa’s service rating — 60 A, 50 A, or 40 A. Incorrect settings can cause nuisance breaker tripping or inefficient heating.
• ⚠️ Verify JP19-3 is OFF for US 60 Hz operation before energizing
• ⚠️ JP9-15 must remain OFF after factory reset use — leaving it ON causes repeated factory resets on every power cycle
• ⚠️ Verify JP19-1 matches your regional preference (OFF for °F in US default)
• ⚠️ Verify JP9-9 is ON to enable Pump 2 operation

Platform / Pump Configuration Safety

• ⚠️ Do NOT install the 6600-728 on a spa with a 2-speed Pump 1 — use the 6600-730 instead
• ⚠️ Do NOT install the 6600-728 on an 880 NT System spa (different topside: 6600-854 / 6600-882 / 6600-425) — use the 6600-390 (2-pump) or 6600-392 (3-pump) instead
• ⚠️ Do NOT install the 6600-728 on an 850 Maxxus® 3-Pump spa — incompatible platform; use the 6600-094 instead
• ⚠️ Do NOT install the 6600-728 on a Jacuzzi® J-485 3-pump spa — incompatible; different J-400 Series 3-pump board required
• ⚠️ Do NOT install the 6600-728 on a pre-waterfall 2005 880 Series spa — the Hi-Flow circ pump (6500-907 or 6000-907) is required for proper operation
• ⚠️ Do NOT pair this board with an 880 NT topside — the 6600-860 LCD topside is the correct match for the 6600-728 Sundance® platform

Water & Electrical Safety

• ⚠️ Ensure no water ingress into the control box during installation
• ⚠️ Inspect all gaskets and seals; replace if damaged
• ⚠️ Never touch any electrical component with wet hands

Post-Installation

• ⚠️ Verify the topside panel displays correctly on first power-up
• ⚠️ Confirm both 1-speed pumps operate correctly
• ⚠️ Confirm the PermaClear® Hi-Flow circulation pump starts and runs continuously
• ⚠️ Verify the PermaClear® ozone module activates during filter cycles
• ⚠️ Test the hi-limit function and GFCI trip before allowing bathers in the spa
• ⚠️ Monitor for fault codes during the first 24 hours of operation

🔍 Error Codes & Troubleshooting

Common Sundance® 880 LCD / Jacuzzi® J-400 LCD Platform Codes

Code	Meaning	Basic Troubleshooting
FLO	Pressure / flow switch fault	Clean filter; check plumbing blockages; inspect flow switch
OH / OHH / OHS	Overheating detected	Allow water to cool; verify circulation pump flow; check temperature sensor 6600-167
Sn1	Hi-limit sensor malfunction	Check sensor 6600-110 connection; reset spa; replace sensor if faulty
Sn3	Heater deactivated	Inspect heater breaker; test heater element continuity; verify JP9-7/JP9-11 logic matches service
TH1 / TH2 / TH3	Temperature probe failure	Test sensor resistance; replace temperature sensor (6600-167)
ICE	Freeze-risk condition detected	Verify heater function; raise setpoint; check ambient temperature
Cool	Water temperature more than 20°F below setpoint	Verify heater operation; confirm heater breaker
HFL	Heater flow / sensor discrepancy	Clean filter; verify circ flow; inspect temperature sensors
Pump 2 not responding	JP9-9 mis-configured or topside command issue	Verify JP9-9 = ON; verify topside button response

Trouble Log

The 6600-728 includes a built-in trouble log (enabled via JP9-1 = ON). When enabled, the board logs fault events that can be retrieved through the topside panel’s diagnostic menu. Consult your spa’s service documentation for retrieval instructions specific to your topside panel (Sundance® 6600-860 or Jacuzzi® 20318-001).

Software Logic Version Verification

Per manufacturer documentation: “See software logic version on the topside main Control Panel when spa power is reset / rebooted.” This displays your current processor revision during the boot sequence, helping identify whether your system is on the EPROM-based (pre-2011) or IC Processor-based (Feb 2011+) architecture.

⚠️ Fault code behavior may vary based on specific Sundance® 880 or Jacuzzi® J-400 / J-300 LCD model year and topside firmware.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ 2005–2015 Sundance® 880 Series Altamar®, Cameo®, or Optima® with 2 × 1-speed pumps	✅ Direct OEM replacement	Configure jumpers per spa service size
♨️ 2007–2015 Sundance® 880 Marin® with 2 × 1-speed pumps	✅ Direct OEM replacement	Pair with 6600-860 topside
♨️ 2005–April 2009 Sundance® 880 Capri® or Majesta® with 2 × 1-speed pumps	✅ Direct OEM replacement	Capri®/Majesta® transitioned to 880 NT platform after ~April 2009
♨️ 2006–Mid 12/2009 Jacuzzi® J-460, J-465, J-470, J-480	✅ Direct OEM replacement	Pair with Jacuzzi® 20318-001 topside
♨️ 2006–2009 Jacuzzi® J-300 LCD with 2 × 1-speed pumps	✅ Direct OEM replacement	J-300 LCD Display platform
♨️ Legacy spa with discontinued 6600-098 / 6600-161 / 6600-180 board	✅ OEM upgrade replacement	Current revision with surface-mount heater terminals
🛁 Spa with 2-speed Pump 1	❌ Not compatible	Use 6600-730
🛁 Pre-waterfall 2005 880 Series spa (without Hi-Flow circ)	❌ Not compatible	Pre-waterfall platform — contact Parts4Tubs
🛁 850 Maxxus® 3-pump	❌ Not compatible	Use 6600-094
🛁 Jacuzzi® J-485 3-pump	❌ Not compatible	Different J-400 3-pump board required
🛁 880 NT System (post-2008 platform)	❌ Not compatible	Use 6600-390 (2-pump) or 6600-392 (3-pump)

🤔 Frequently Asked Questions

Q: My spa is a 2008 Sundance® Optima®. Is this the right board? A: Possibly — but you must verify two things:

1. Pump configuration: Is Pump 1 1-speed or 2-speed? If 1-speed, the 6600-728 is correct. If 2-speed, use the 6600-730.
2. Platform: Is your topside the 11-button 6600-860 LCD trapezoid (880 LCD platform — use 6600-728 or 6600-730), or is it the 12-button 6600-854 trapezoid (880 NT platform, which started for Optima® in early 2008 — use 6600-390 instead)?

Compare your existing board’s part number (6600-098/161/180 for LCD, 6600-164/176 for NT) and your topside panel before ordering. Contact Parts4Tubs if you’re unsure.

Q: What’s the difference between the 6600-728 and the 6600-730? A: Both are on the same 880 LCD platform and share the same physical footprint and jumper banks (JP19 + JP9). The difference is the Pump 1 speed configuration:

• 6600-728 (this board): Pump 1 = 1-Speed, Pump 2 = 1-Speed (both 1-speed)
• 6600-730: Pump 1 = 2-Speed, Pump 2 = 1-Speed (2-speed P1 variant)

Check your existing spa’s pump labeling or Pump 1 wiring to determine which board is correct. Both pumps being 1-speed is the typical Jacuzzi® J-400 / J-300 LCD configuration; 2-speed Pump 1 is more common on Sundance® 850 LCD spas.

Q: My existing board is labeled 6600-098 with an old EPROM chip. Will the 6600-728 work? A: Yes. The 6600-098 (original 2005–Feb 2008 with EPROM Rev 9.51A Dallas Chip) has been discontinued, and the 6600-728 is the factory-designated current replacement. The new board has surface-mount heater terminals and the same mounting footprint. You may need to configure the JP19 and JP9 jumpers on the new board to match your spa’s operating logic — see the Board Functions section above.

Q: My board says 6600-161 and has a Microprocessor chip (not an EPROM). Will this still be replaced by the 6600-728? A: Yes. The 6600-161 transitioned from EPROM Rev 9.51B (Dallas Chip) to IC Processor 2.0A (Microprocessor) in early February 2011. Both memory architectures are fully interchangeable with the current 6600-728, and the new board supersedes both variants.

Q: My Jacuzzi® spa is a J-485. Is the 6600-728 the right board? A: No. The J-485 is a 3-pump Jacuzzi® J-400 Series spa, and the 6600-728 is a 2-pump board. A different J-400 Series 3-pump board is required — contact Parts4Tubs for the correct current OEM replacement for your specific J-485 year.

Q: What topside panel works with this board? A: Two OEM topsides pair with the 6600-728:

• Sundance® 6600-860 — 11-button trapezoid LCD topside for Sundance® 880 Series spas (2001+ 850/880 LCD platform)
• Jacuzzi® 20318-001 — Jacuzzi®-branded LCD topside for J-400 and J-300 LCD Series spas

If your existing topside is functional, retain it.

Q: What jumper setting do I use for JP9-7 and JP9-11? A: These depend on your spa’s electrical service size (shown on the data plate):

• 60 A service: JP9-7 = ON, JP9-11 = OFF — allows 2 pumps on with heater
• 50 A service: JP9-7 = OFF, JP9-11 = OFF — forces heater off when more than 1 pump is on
• 40 A service: JP9-7 = OFF, JP9-11 = ON — forces heater off with any pump on high speed

Setting the wrong logic can cause nuisance breaker tripping or insufficient heating.

Q: My 2005 Sundance® 880 spa doesn’t have a waterfall or the Hi-Flow circ pump. Will this board work? A: Probably not directly. Per manufacturer documentation, the 6600-728 is specified for Sundance® 880 Series spas AFTER the waterfall and Hi-Flow circ were introduced (you must have either the 6500-907 or 6000-907 Hi-Flow circulation pump). Earlier 880 configurations may require a different board. Contact Parts4Tubs with your spa’s production date for confirmation.

Q: Is this a Sundance® 880 LCD board or an 880 NT board? A: The 6600-728 is the 880 LCD platform board — it pairs with the 6600-860 11-button trapezoid LCD topside. The 880 NT (New Technology) platform uses different boards (6600-390 for 2-pump, 6600-392 for 3-pump Maxxus®/Aspen®) and different topsides (6600-854 / 6600-882 / 6600-425). Confirm your platform before ordering.

Q: Is this board also sold as SUN6600-728 or 382840? A: Yes. SUN6600-728 is the distributor-format prefix for the same board, and 382840 is a distributor alternate part number reference. All three identifiers refer to the same current 6600-728 OEM product.

Q: Do I need a licensed electrician to install this? A: Yes. NEC Article 680 and most US local jurisdictions require a licensed electrician for all hot tub electrical work, and a permit may be required.

Q: Is this an OEM or aftermarket board? A: The 6600-728 is the genuine OEM Sundance® / Jacuzzi® replacement board, factory-new with current-revision architecture and surface-mount heater terminals.

✅ Why Choose the 6600-728

• ✅ Genuine OEM Sundance® / Jacuzzi® replacement – factory-new with current-revision architecture
• ✅ Consolidates THREE discontinued predecessor boards (6600-098, 6600-161, 6600-180) into one current part
• ✅ Surface-mount heater terminals on the current revision for reliable heater connections
• ✅ Same physical footprint as predecessors — direct drop-in
• ✅ Comprehensive JP19 + JP9 jumper banks for full regional and system-logic customization
• ✅ Full PermaClear® ozone and 24-hour Hi-Flow circulation pump support
• ✅ Broad model-year compatibility across Sundance® 880 LCD and Jacuzzi® J-400 / J-300 LCD Series
• ✅ Backed by the Sundance® / Jacuzzi® manufacturer’s limited warranty

🇺🇸 Why Buy From Parts4Tubs

• ✅ Fast US shipping
• ✅ Expert platform disambiguation help — the #1 ordering error on the 6600-728 is confusing the 880 LCD platform (this board) with the 880 NT platform (uses 6600-390 instead), or confusing 2 × 1-speed (this board) with 2-speed P1 + 1-speed P2 (uses 6600-730 instead). Send us photos of your existing board and topside and we’ll confirm the correct current replacement before you order.
• ✅ Legacy chain expertise — we handle the 6600-098 → 6600-161 → 6600-180 → 6600-728 transition, including the EPROM-to-Microprocessor memory architecture change in early February 2011
• ✅ Competitive pricing on current OEM boards
• ✅ Full manufacturer warranty support
• ✅ Matching companion parts in stock — 6600-860 Sundance® topside panel, Jacuzzi® 20318-001 topside, 6600-167 temperature sensor, 6600-110 hi-limit sensor, Hi-Flow circulation pumps, PermaClear® UV lamps, and related 880 LCD / J-400 LCD service parts
• ✅ Platform-history expertise across seven generations of Sundance® 850/880 circuit boards (Original 850 Series → 850 NT → 850/880 LCD → 880 NT → 880 SunTouch™ → Post-SunTouch™, plus parallel LX-15 / Sweetwater and Jacuzzi® J-Series platforms)

⭐ Summary

The Sundance® / Jacuzzi® 6600-728 is the current OEM replacement circuit board for 2005–2015 Sundance® 880 Series (Altamar®, Cameo®, Capri®, Marin®, Optima®, Majesta®), 2006–Mid 12/2009 Jacuzzi® J-400 Series (J-460, J-465, J-470, J-480), and 2006–2009 Jacuzzi® J-300 LCD Series hot tubs with TWO single-speed jet pumps (Pump 1 = 1-Speed, Pump 2 = 1-Speed), a dedicated 24-hour PermaClear® Hi-Flow circulation pump, and PermaClear® ozone sanitation. It consolidates three discontinued predecessor boards — 6600-098 (original, 2005–Feb 2008, EPROM Rev 9.51A), 6600-161 (Feb 2008–Apr 2009, EPROM Rev 9.51B / IC Processor 2.0A), and 6600-180 — into a single current OEM part with added surface-mount heater terminals. Features comprehensive JP19 (regional/display) and JP9 (system logic including 40 A / 50 A / 60 A heater logic) jumper banks. Pair with the Sundance® 6600-860 or Jacuzzi® 20318-001 topside panel. For 2-speed Pump 1 variants, use the companion 6600-730; for 880 NT platform spas, use the 6600-390 or 6600-392; for 850 Maxxus® 3-pump, use the 6600-094. Not compatible with 850 Maxxus® 3-pump, Jacuzzi® J-485 3-pump, pre-waterfall 880 installations, 880 NT platform, or 2014–2015 J-300 LED Series. Non-returnable; manufacturer’s limited 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.