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96"/31" Temp/Hi-Limit Sensor 30278KIT - Bubbles Supply

96"/31" Temp/Hi-Limit Sensor 30278KIT

Part #: 30278KIT

$141.72
In stock — ships today
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Also replaces

30278
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

This Balboa temperature and hi-limit sensor features a 96-inch cable with a 1/4-inch bulb, designed for hot tubs and spas requiring extended sensor reach. As an OEM Balboa part, this dual-function sensor monitors water temperature while providing critical hi-limit protection to prevent overheating. The extended 96-inch cable length makes it ideal for larger spa configurations or installations where the control box is positioned further from the heater.

At Bubbles Supply, we guarantee this sensor will be an exact fit for your Balboa system, backed by our 1-year warranty and same-day shipping. This genuine OEM sensor helps resolve common error codes including HH (high temperature), ICE (freeze protection), and OH (overheat) conditions. Proper sensor placement in the heater manifold and secure cable routing are essential for reliable temperature monitoring and safety system operation.

Exact part number

30278KIT

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 30278
  • 96-inch spa sensor
  • Balboa 30278
  • Balboa dual sensor
  • temp/hi-limit combo 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 — spa shuts down due to overheat detection
  • ICE error code — freeze protection triggering incorrectly
  • Spa water temperature reading inaccurate or erratic
  • Spa heater not activating despite low water temperature
  • Spa entering continuous overheat lockout with no actual heat buildup

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

Before you buy — quick checklist

  • Confirm your control system is a Balboa board — this is an OEM Balboa sensor and may not be compatible with other brands
  • Verify your existing sensor uses a 1/4-inch bulb diameter — measure the sensor pocket or existing sensor tip before ordering
  • Measure your current sensor cable length — 96 inches is the full cable run; confirm you need this length vs. a shorter 31-inch variant
  • Check whether your system uses a combined temp/hi-limit sensor or separate sensors — this is a dual-function unit
  • Note the error codes currently displayed on your topside (HH, OH, ICE) to confirm a sensor fault is the root cause before replacing
  • Inspect the sensor well or thermowell in your heater manifold for corrosion or damage before installing the new sensor

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

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

What's in the box

  • Temp/hi-limit sensor with 96-inch cable
  • 1/4-inch sensor bulb
  • Replacement sensor kit components

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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