🚀 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. →
SD6600-068

Curled Fingers Hi-Limit Sensor SD6600-068

Part #: SD6600-068

$32.41
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 sensor

The Curled Fingers Hi-Limit Sensor SD6600-068 is an OEM replacement safety sensor designed for Sundance Spas systems. This critical component monitors water temperature and automatically shuts down your spa when unsafe conditions are detected, protecting your equipment from overheating damage. The sensor features a 7-foot cable length with a 1/4-inch bulb for precise temperature sensing.

This genuine Sundance replacement sensor addresses common error codes including HH (high temperature), ICE (freeze protection), and OH (overheat) conditions. At Bubbles Supply, we guarantee this sensor will fit your Sundance spa exactly as the original, with same-day shipping on in-stock orders and our comprehensive 1-year warranty for complete peace of mind. Proper installation requires connecting the sensor to your spa's control system - ensure power is disconnected before replacing any electrical components for safe installation.

Exact part number

SD6600-068

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • freeze sensor
  • Hi-limit sensor
  • high-limit sensor
  • overheat sensor
  • temperature safety 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:

  • Spa displaying HH error code and shutting down
  • Spa displaying OH (overheat) error and not heating
  • ICE error code triggering incorrectly in mild temperatures
  • Spa shutting off prematurely before reaching set temperature
  • Spa not responding to temperature changes accurately
  • Control panel showing persistent fault codes after water temp has normalized

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

Before you buy — quick checklist

  • Confirm your spa is a Sundance Spas brand — this is an OEM part and may not cross-fit other manufacturers
  • Verify the existing sensor has a 1/4-inch bulb diameter before ordering
  • Check your existing sensor's cable length — this unit is 7 feet; make sure that reaches your control box routing
  • Note whether you're replacing the hi-limit sensor or the temp sensor — these are different components and look similar
  • Diagnose the sensor before replacing: use a multimeter to test resistance and confirm the sensor has actually failed, not the topside controller or circuit board

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

Install difficulty: Medium — Some experience neededTypically 30-45 minutes

What's in the box

  • Hi-limit sensor with curled finger retainer
  • 7-foot sensor cable

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