The Sundance Topside Control Panel (6600-866) is a keypad for MAXXUS 850 series Sundance spas (2000–2004), designed for 3-pump systems.

Specifications:

• Brand: Sundance Spas
• Series: MAXXUS 850, 2000–2004
• Configuration: 3-pump system
• Controls: Jets, temperature, and lighting
• Part no: 6600-866

Fits/replaces:

• Sundance MAXXUS 850 spas manufactured 2000–2004
• Confirm your existing panel's model and part number match 6600-866 before ordering — topside panels are model-specific

Common signs you need this part:

• Topside display is unresponsive, cracked, or shows no power
• Buttons don't register presses or respond inconsistently
• Persistent error codes not resolved by other troubleshooting

Returns & installation: Topside panels are electrical components and are non-returnable once opened, per our Terms & Conditions. Professional installation is recommended.

FAQ

Will this fit my Sundance spa? It's built for MAXXUS 850 3-pump systems from 2000–2004 — confirm your existing panel's part number matches before ordering.

Can I return this if it's the wrong part? No — topside panels are final sale once opened, so confirm compatibility before ordering.