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31" x 1/4" Bulb Hi-Limit Sensor 30298 - Bubbles Supply

31" x 1/4" Bulb Hi-Limit Sensor 30298

Part #: 30298

$111.90
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The Balboa 31" x 1/4" Bulb Hi-Limit Sensor (Part #30298) is an essential safety component for Balboa-equipped spas and hot tubs. This OEM sensor monitors water temperature to prevent dangerous overheating conditions, automatically shutting down the system when temperatures exceed safe limits. The 31-inch cable length and quarter-inch bulb design make it compatible with a wide range of Balboa control systems.

This genuine Balboa replacement sensor comes with our exact fit guarantee, ensuring seamless integration with your existing system. We ship same-day from our Canadian warehouse and back every sensor with a full 1-year warranty for your peace of mind. The hi-limit sensor helps resolve common error codes including HH (high heat), ICE (freeze protection), and OH (overheat) conditions. Professional installation is recommended to ensure proper sensor placement and secure electrical connections for reliable temperature monitoring and spa safety.

Exact part number

30298

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Also known as / Replaces

This part replaces or is interchangeable with:

  • Hi-limit sensor
  • high-limit sensor
  • overheat sensor
  • spa temperature safety sensor
  • thermal cutoff 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 displayed on topside panel
  • OH error code displayed on topside panel
  • ICE error code triggered incorrectly
  • Spa shuts down unexpectedly due to false overheat detection
  • Spa fails to heat and displays a high-limit fault
  • Hi-limit trips repeatedly at normal operating temperatures

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

Before you buy — quick checklist

  • Confirm your Balboa control board model accepts a 1/4-inch bulb-style hi-limit sensor
  • Measure the sensor lead length on your existing sensor — this replacement is 31 inches
  • Verify the hi-limit sensor well or port diameter is compatible with a 1/4-inch bulb
  • Check whether your system uses a separate hi-limit and thermistor, or a combo sensor — this is hi-limit only
  • Inspect the sensor housing and wiring harness connector before ordering to confirm it matches your existing plug type

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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