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850/880 PCB Sensor Plug 6660-055 - Bubbles Supply

850/880 PCB Sensor Plug 6660-055

Part #: 6660-055

$7.01
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this circuit board

The 850/880 PCB Sensor Plug (part #6660-055) is an OEM replacement 14-pin connector designed for Sundance Spas control systems. This genuine sensor plug connects your spa's temperature sensor, hi-limit sensor, and flow switch to the circuit board, ensuring proper communication between critical safety and comfort components.

Built to exact Sundance specifications, this sensor plug delivers the precise fit and reliable performance your spa demands. At Bubbles Supply, we guarantee an exact fit with same-day shipping on in-stock items, plus our standard 1-year warranty for complete confidence. The 14-pin configuration handles temperature monitoring, hi-limit safety functions, and flow switch operation seamlessly. Verify your existing sensor plug's pin count and connection style before ordering to ensure proper compatibility with your Sundance spa's control system.

Exact part number

6660-055

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 14-pin sensor plug
  • control board sensor harness connector
  • PCB sensor connector
  • sensor wire plug

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 sensor error or fault code
  • Temperature reading is erratic or not displaying
  • Hi-limit fault triggering without an actual overheat condition
  • Flow switch not communicating with the control board
  • Spa shutting down unexpectedly due to failed sensor signal
  • Loose or corroded connector causing intermittent spa operation

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

Before you buy — quick checklist

  • Count the pins on your existing sensor plug — confirm it is a 14-pin configuration before ordering
  • Verify your spa is an 850 or 880 series Sundance model — check the control pack label or owner's manual
  • Inspect whether the issue is the plug itself or the sensor wire harness — this part is the connector only
  • Check for corrosion or bent pins on the existing PCB header before replacing the plug, as board damage may also need to be addressed

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

Install difficulty: Medium — Some experience neededTypically 30-60 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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