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J300 Circuit Board 6600-505 - Bubbles Supply

J300 Circuit Board 6600-505

Part #: 6600-505

$672.39
In stock — ships today
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About this circuit board

The Jacuzzi J300 Circuit Board (6600-505) is the main control board for J300 series spas, managing pump operations, heating cycles, and system diagnostics. This 2-pump, 60Hz control board features electronic controls designed for 2020+ model year compatibility, delivering reliable performance for your Jacuzzi spa's essential functions.

As an OEM Jacuzzi part, this circuit board ensures exact fit and seamless integration with your existing control pack system. We guarantee same-day shipping on in-stock orders and back every control board with our comprehensive 1-year warranty for complete confidence in your repair. Professional installation is recommended for this control component – verify your current board's part number matches 6600-505 before ordering to ensure proper compatibility with your J300 spa's electrical specifications.

Exact part number

6600-505

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • J300 control pack board
  • J300 main control board
  • J300 PCB
  • Jacuzzi 6600-505 circuit board

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

Technical specifications

Voltage
240V

Common symptoms this part fixes

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

  • Spa displays error codes and will not clear
  • Pumps not responding to topside control commands
  • Heater not cycling on or off correctly
  • Spa locks out and goes into persistent fault mode
  • Topside panel shows blank or frozen display linked to board failure
  • One or both pumps running continuously or not at all

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

Before you buy — quick checklist

  • Confirm your existing board's part number is 6600-505 — do not rely on model name alone
  • Verify your J300 spa is a 2020 or later model year before ordering
  • Confirm your spa runs on a 2-pump configuration — this board is not for single-pump setups
  • Confirm your supply voltage is 240V, 60Hz
  • Check whether the fault is in the board itself versus the topside controller, heater, or sensors before replacing
  • Document all existing wiring connections with photos 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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