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LCD 850/880 Circuit Board 6600-397 - Bubbles Supply

LCD 850/880 Circuit Board 6600-397

Part #: 6600-397

$1681.25
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this circuit board

The Sundance LCD 850/880 Circuit Board (6600-397) is the main control board for Sundance spa systems featuring LCD topside displays. This OEM replacement board operates at 50Hz frequency and serves as the central processing unit for your spa's heating, filtration, and jet control functions.

Engineered to Sundance's exact specifications, this circuit board delivers reliable performance and seamless integration with your existing spa system. At Bubbles Supply, we guarantee an exact fit for your spa with our authentic OEM parts, backed by our comprehensive 1-year warranty. Most orders ship the same day for minimal downtime. Professional installation is recommended due to electrical connections and programming requirements—always verify your spa's current board part number before ordering to ensure proper compatibility.

Exact part number

6600-397

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 850/880 control board
  • Sundance 6600-397 PCB
  • Sundance LCD main board

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:

  • Spa displays blank or unresponsive LCD screen
  • Heating system not activating or holding set temperature
  • Jets unresponsive to topside controls
  • Filtration cycle not running on schedule
  • Error codes that persist after power cycling
  • Spa controls frozen or randomly cycling without input

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

Before you buy — quick checklist

  • Physically locate the part number on your existing board and confirm it reads 6600-397 before ordering
  • Verify your spa is an 850 or 880 Series model with an LCD topside display — do not order for touchpad or membrane-style displays
  • Check whether your board shows visible burn marks, corroded traces, or blown components to confirm the board is the root cause before replacing
  • Rule out a faulty topside control or damaged ribbon cable before condemning the main board
  • Document or photograph all wiring harness connections before disconnecting the old board

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

Install difficulty: Hard — Technician recommendedTypically 60-120 minutes

Warranty

1 year manufacturer 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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