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NEO Hi-Limit Sensor 775-0101 - Bubbles Supply

NEO Hi-Limit Sensor 775-0101

Part #: 775-0101

$51.60
In stock — ships today
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🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The Waterway NEO Hi-Limit Temperature Sensor (775-0101) is an OEM replacement part designed for Waterway NEO control systems in residential spas and hot tubs. This precision 10K ohm thermistor operates at ±3% tolerance to accurately monitor water temperature and prevent overheating by shutting down the heater when unsafe temperatures are detected.

When your spa displays HH, ICE, or OH error codes, this hi-limit sensor is often the culprit. At Bubbles Supply, we guarantee this is the exact OEM part your system needs, backed by our 1-year warranty and same-day shipping on in-stock items. The sensor's reliable temperature monitoring protects your spa's heating element and ensures safe operation. Verify your current sensor's part number and wiring configuration before installation to ensure proper fitment with your Waterway NEO control system.

Exact part number

775-0101

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Also known as / Replaces

This part replaces or is interchangeable with:

  • Hi-limit sensor
  • hi-limit thermistor
  • high limit sensor
  • NEO hi-limit probe
  • overtemp 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 displays HH error code
  • Spa displays OH error code
  • Spa displays ICE error code
  • Heater shuts down unexpectedly
  • Spa overheats or fails to maintain set temperature
  • Control system locks out heating element at normal operating temps

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

Before you buy — quick checklist

  • Confirm your control system is the Waterway NEO — this sensor is not universal across Waterway product lines
  • Match the part number 775-0101 to your existing sensor label before ordering
  • Note the wiring connector configuration on your current sensor to verify compatibility
  • Check whether your spa is throwing HH, OH, or ICE codes — these point specifically to the hi-limit circuit
  • Do not assume a faulty reading is always the sensor — inspect wiring harness and connector pins for corrosion or damage first

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

Install difficulty: Easy — DIY-friendlyTypically 15-30 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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