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850 Maxxus Trapezoid Keypad 6600-866 - Bubbles Supply

850 Maxxus Trapezoid Keypad 6600-866

Part #: 6600-866

$1133.73
In stock — ships today
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🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this topside/keypad

The 850 Maxxus Trapezoid Keypad (6600-866) is a genuine OEM spaside control panel designed for Sundance Spas systems. This gray trapezoid-shaped control features a 3-pump configuration, allowing you to manage multiple spa functions directly from poolside. Built to Sundance's exact specifications, this control pack delivers the reliability and performance your spa demands.

At Bubbles Supply, we guarantee this keypad will be an exact fit for your compatible Sundance spa system. Every 850 Maxxus control ships the same day when ordered before our cutoff, and comes backed by our comprehensive 1-year warranty for complete peace of mind. Professional installation is recommended to ensure proper wiring connections and optimal performance of all pump and system controls.

Exact part number

6600-866

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 6600-866 keypad
  • Sundance 850 Maxxus spaside control
  • trapezoid control panel

Looking for an older part number? Check our supersession lookup tool

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Keypad buttons unresponsive or intermittently failing
  • Display blank or showing garbled characters
  • Spa functions not responding to button presses
  • Cracked, faded, or physically damaged control panel
  • Pump or jet controls not cycling correctly from topside
  • Backlight failure or dim display

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your spa model is the 850 Maxxus — do not assume fitment from spa year alone
  • Locate the existing keypad label or control pack to verify part number 6600-866 before ordering
  • Check the cable connector on your existing keypad — pin count and connector style must match
  • Inspect the control pack (pack box) for the source of the issue before replacing the topside keypad alone
  • Note your spa's pump configuration — this keypad is designed for a 3-pump setup and must match your system

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Medium — Some experience neededTypically 30–60 minutes

What's in the box

  • 850 Maxxus Trapezoid Keypad (6600-866)
  • Connecting cable (verify inclusion at time of order)

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

Warranty

1 year warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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