Part Number: 6600-101
Brand: Sundance Spas
Jacuzzi® J‑300 Printed Circuit Board – J‑380 / J‑385 (2002–2006), Ribbon‑Style Topside Connection
⚠️ IMPORTANT DISCLAIMER – PLEASE READ BEFORE PURCHASING
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There are no refunds or returns on electronic spa parts, including control panels and keypads.
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Please verify compatibility with your hot tub model before ordering.
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All electronic components are covered under the original manufacturer’s warranty.
Overview
Part 6600‑101 is the OEM main system circuit board used in Jacuzzi® J‑300 Series spas—specifically the J‑380 and J‑385—produced between 2002 and 2006. This PCB supports 3‑pump system operation, integrates with the LCD topside control panel, and uses the ribbon‑style topside connector standard to these early‑generation Jacuzzi electronic packs.
This board is essential to managing all core spa functionality, including hydrotherapy pump control, heater logic, lighting, filtration cycles, and safety monitoring.
Compatible Spa Models & Years
✔ Jacuzzi® J‑300 Series (2002–2006)
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J‑380 — 3‑pump models (LCD topside)
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J‑385 — 3‑pump models (LCD topside)
✔ Sundance® 850 Series Equivalents
The 6600‑101 PCB is also used in several 2004-2006 Sundance® 850‑Series systems from the same era because these platforms shared identical control architecture.
Technical Details
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Board Type: Main system control PCB
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Topside Connection: Ribbon‑style (LCD panel)
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Pump Capacity: Supports 3‑pump hydrotherapy configuration
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Heater Logic: Integrated safety and temperature regulation
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Lighting Control: Supports early J‑300 lighting circuits
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Filtration: Programmable filtration cycles (depending on topside model)
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Power Management: Controls heater/pump sequencing for load balance
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Safety Systems:
- Overheat protection
- Flow/pressure monitoring (via external sensors)
- Watchdog and fault monitoring
Purpose & Performance
The 6600‑101 circuit board manages all major operational functions in early‑2000s Jacuzzi® J‑300 spas:
- Jet pump activation (Pump 1, Pump 2, Pump 3)
- Heater enable/disable logic
- LCD topside communication
- Filtration cycle scheduling
- Water temperature regulation
- High‑limit and watchdog safety routines
- System diagnostics
Replacing this board resolves common issues such as:
- Dead/unresponsive topside
- Pumps failing to start
- Heater not turning on
- FLO / OH errors caused by board failure
- Lighting malfunctions
- Random system resets
Related / Interchangeable Components
| Part Number |
Description |
| 6600‑028 |
Early‑generation board (predecessor in some J‑300 packs) |
| 6600‑398 / 6600‑392 |
Later Sundance/Jacuzzi 3‑pump boards (not direct replacements—different platform) |
| 6600‑110 / 6600‑167 |
Temperature and hi‑limit sensors used with early J‑300 controllers |
| 6600‑515 |
Power transformer (compatible with early 850/J‑300 system packs) |
Ordering Notes
- Only compatible with Jacuzzi J‑380 and J‑385 units configured as 3‑pump systems with LCD ribbon‑style topside controls.
- Will NOT replace Sundance 780/880/980 boards.
- Will NOT replace later J‑300 boards using mini‑DIN connectors.
- Always confirm control box model and topside style before ordering.
- As with all spa electronics, PCB sales are non‑returnable once installed.
