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Hi-Limit Harness 6600-445 - Bubbles Supply

Hi-Limit Harness 6600-445

Part #: 6600-445

$50.76
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The Hi-Limit Harness 6600-445 is an OEM sensor harness designed for Dimension One Spas systems. This essential wiring component connects your spa's hi-limit and temperature sensors, ensuring accurate temperature monitoring and safe operation. When sensor communication fails or throws error codes like HH, ICE, or OH, this harness often provides the solution by restoring proper electrical connections between your spa's control system and safety sensors.

Built to Dimension One's exact specifications, this genuine replacement harness delivers reliable performance you can trust. At Bubbles Supply, we guarantee an exact fit for your spa with same-day shipping on in-stock orders and back every part with our comprehensive 1-year warranty. Whether you're troubleshooting temperature sensor issues or performing preventive maintenance, this OEM harness ensures your spa operates safely and efficiently.

Verify your existing harness part number matches 6600-445 before ordering to ensure proper compatibility with your Dimension One spa's control system.

Exact part number

6600-445

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • Hi-Limit Sensor Harness
  • Sensor Cable Assembly
  • Temperature Sensor Wiring Harness

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 displayed on topside panel
  • OH error code (overheating fault) triggered at normal temperatures
  • ICE error code appearing in moderate conditions
  • Spa shutting down unexpectedly due to false high-limit trips
  • Temperature reading stuck, erratic, or not updating
  • Spa will not heat due to sensor communication fault

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

Before you buy — quick checklist

  • Confirm your existing harness is labeled or stamped with part number 6600-445
  • Visually inspect the harness for cracked insulation, corroded pins, or melted connector housings before assuming the harness is the root cause
  • Test the hi-limit and temp sensors themselves — a bad sensor can mimic a harness fault
  • Verify your spa's control board model to confirm this harness is the correct mating connector
  • Check whether the error code clears after a full power cycle before ordering — some faults are software resets, not hardware failures

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

Install difficulty: Medium — Some experience neededTypically 30–60 minutes

Warranty

1 year 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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