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Water Temperature Sensor 6600-551 - Bubbles Supply

Water Temperature Sensor 6600-551

Part #: 6600-551

$92.88
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The Water Temperature Sensor 6600-551 is a genuine OEM 3-pin water temperature assembly designed for Sundance Spas systems. This critical sensor monitors your spa's water temperature and communicates with the control system to maintain your desired heat settings. When this sensor fails, you may experience error codes like HH (high heat), ICE (low temperature), or OH (overheat) messages on your display.

At Bubbles Supply, we guarantee this is the exact fit replacement for your Sundance spa with same-day shipping and a full 1-year warranty for your peace of mind. This genuine Sundance part ensures reliable temperature monitoring and proper system function, eliminating frustrating error codes and temperature control issues. Installation requires basic electrical connections to the 3-pin connector - always disconnect power before replacing any spa sensors.

Exact part number

6600-551

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 3-pin temperature sensor
  • hi-limit sensor
  • spa water temperature probe
  • Sundance temp sensor

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:

  • HH error code on display (high heat fault)
  • ICE error code on display (freeze protection triggered)
  • OH error code on display (overheat fault)
  • Spa heater not turning on or heating inconsistently
  • Spa overheating with no display warning
  • Control system unable to read or maintain water temperature

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

Before you buy — quick checklist

  • Confirm your spa displays HH, ICE, or OH error codes before assuming the sensor is faulty — the control board or heater may be the root cause
  • Verify your Sundance spa's control system accepts a 3-pin temperature sensor connector
  • Inspect the sensor well or thermowell for corrosion or damage before installing the new sensor
  • Check the existing sensor harness and wiring for damage — a bad connection can mimic sensor failure
  • Have your spa's model and serial number on hand to confirm fitment before ordering

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

Install difficulty: Easy — DIY-friendlyTypically 15-30 minutes

What's in the box

  • Water temperature sensor assembly
  • 3-pin connector harness

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.

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