Part Number: 6600-605
Brand: Sundance Spas
Control Panel: Sundance® 780 Series – 2‑Pump Topside, Revision 2.06 with Exterior Light Feature
⚠️ IMPORTANT DISCLAIMER – PLEASE READ BEFORE PURCHASING
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There are no refunds or returns on electronic spa parts.
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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 6600‑605 is the OEM topside control panel used on November 2023 and newer Sundance® 780 Series spas equipped with two jet pumps. This updated panel—featuring Revision 2.06 firmware—adds full support for the Exterior Light (EXL) function introduced with the 2023 electronics refresh.
It is designed for use across both North American (60 Hz) and Export (50 Hz) markets and pairs with the 2023+ Sundance® 780 control‑box platform.
No gasket is available for this panel (not sold separately by Sundance®).
Compatible Spa Models & Years
✔ Sundance® 780™ Series — 2‑Pump Models
Production Window: 11/2023 – Present
Compatible models:
- Bristol
- Chelsee
- Hamilton
- Montclair
These models require the new 2023+ topside interface and are not compatible with earlier 780 Series topsides.
✖ NOT compatible with:
- Dover (1‑pump) → uses 6600‑604
- Any 780 topside from 2014–2023
- 780 topsides for ENC platform (6600‑063, 6600‑385, etc.)
- 880, 980, or 680 Series
- Any Balboa BP‑based Jacuzzi® panels
- Any pre‑2023 780 wiring harness or firmware
Technical Details
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Voltage: 240V (North America) & 220–240V (Export)
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System Support: 2‑pump 780 Series (2023+ platform)
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Firmware: Revision 2.06
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New Feature: Exterior Light (EXL) control support
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Connector: Ribbon‑style topside cable
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Button Layout (typical):
- Pump 1
- Pump 2
- Light
- Exterior Light (EXL)
- Temp Up / Temp Down
- Menu / Mode
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Display: LED 7‑segment digital display
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Bezel / Color: Sundance® 780 modern graphite finish
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Gasket: No gasket available (factory does not supply one)
Purpose & Performance
The 6600‑605 2‑pump topside provides full user control over:
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Pump 1: Low/High
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Pump 2: High
- Temperature adjustment
- Heater mode programming (Std / Econ / Sleep)
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Exterior light control (EXL) — new for Rev 2.06
- LED interior lighting
- Filtration cycles (Smart Logic)
- System status, temperature, and fault messages
Common failures resolved by replacing this panel:
- No display / blank panel
- Water‑intrusion / membrane failures
- Buttons not responding
- Incorrect temperature display
- Mode or light functions not engaging
- Lost EXL control
Related Components
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6600‑624 — Matching 2‑pump Sundance® 780 control board (11/2023+)
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6600‑604 — 1‑pump 780 Dover panel (2023+)
- Heater assemblies (6500‑series)
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Sensors:
- Temperature (6600‑167)
- Hi‑Limit (6600‑110)
- ClearRay® UV system parts
Ordering Notes
- Fits ONLY Sundance® 780 2‑pump spas manufactured 11/2023 and newer
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Not interchangeable with ANY earlier 780 Series topside
- No gasket is sold or supplied by Sundance®
- Must match the updated 2023+ control board
- Electronic components are non‑returnable under manufacturer policy
- Always verify by spa serial number before ordering
