🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
J850/J300 2-Pump Circuit Board 6600-730 - Bubbles Supply
Exact Fit

J850/J300 2-Pump Circuit Board 6600-730

Part #: 6600-730

$1847.64
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

Upload a Photo
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this spa pump

The J850/J300 2-Pump Circuit Board 6600-730 is the main control system for compatible Jacuzzi and Sundance spa models featuring LCD displays and dual-pump configurations. This OEM circuit board manages essential spa functions including heating cycles, pump operation, and temperature control, effectively resolving common error codes like HH (high limit) and OH (overheat) conditions.

Engineered to Jacuzzi's exact specifications, this genuine replacement board delivers reliable performance with our exact fit guarantee. We ship same-day from our Canadian warehouse and back every circuit board with a full 1-year warranty for complete peace of mind. Professional installation is recommended for circuit board replacements to ensure proper electrical connections and system calibration. Verify your spa's pump configuration and LCD display type before ordering to confirm compatibility.

Exact part number

6600-730

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-pump control board
  • J300 circuit board
  • J850 circuit board

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

Fits these brands and models

Compatible brands

JacuzziSundance
Not sure if it fits your spa? Send us a photo — we'll confirm before you order

Common symptoms this part fixes

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

  • HH error code (high limit)
  • OH error code (overheat)
  • Heater not turning on
  • Pumps not responding to controls
  • LCD display showing error messages
  • Temperature control not working

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

Before you buy — quick checklist

  • Verify your spa has dual-pump configuration
  • Confirm your spa has LCD display
  • Check existing board part number matches 6600-730
  • Take photo of wire connections before removal
  • Ensure spa power is completely disconnected

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

Install difficulty: Hard — Technician recommendedTypically 60-90 minutes

What's in the box

  • Circuit board
  • Installation instructions

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

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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment