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96"/31" Temp/Hi-Limit Sensor 30637 - Bubbles Supply

96"/31" Temp/Hi-Limit Sensor 30637

Part #: 30637

$161.53
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

This Balboa temperature and hi-limit sensor (part #30637) is an OEM replacement component designed for spas equipped with Balboa control systems. The sensor features a 96-inch cable length with a 3/8-inch bulb diameter, providing the precise temperature monitoring your spa needs to maintain safe water temperatures and prevent overheating conditions that trigger HH, ICE, or OH error codes.

When your spa displays temperature-related error messages or fails to heat properly, this genuine Balboa sensor delivers the exact fit and reliability you need. We guarantee perfect compatibility with your existing system, ship the same day you order, and back every sensor with our comprehensive 1-year warranty. The 96-inch cable provides ample reach for most installation configurations, but verify your existing cable length and bulb size before ordering to ensure proper fitment.

Exact part number

30637

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 96-inch spa sensor
  • Balboa 30637 sensor
  • 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:

  • Spa displaying HH error code (high heat / overheat fault)
  • Spa displaying OH error code (overheating)
  • Spa displaying ICE error code (freeze protection triggered)
  • Spa not heating or heater cycling off prematurely
  • Inaccurate water temperature reading on topside display
  • Spa shutting down unexpectedly due to false temperature fault

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

Before you buy — quick checklist

  • Confirm your Balboa control board accepts a combined temp/hi-limit sensor on a single harness — some systems use two separate sensors
  • Measure your existing sensor cable length before ordering — this unit is 96 inches (8 feet); shorter cable versions exist
  • Verify the bulb diameter of your current sensor is 3/8 inch to ensure it seats correctly in the sensor well
  • Check your sensor well location — confirm 96 inches of cable will reach your control box without excess slack or tension
  • Note the connector type on your existing sensor harness and compare to the 30637 before disconnecting

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

Install difficulty: Easy — DIY-friendlyTypically 15–30 minutes

What's in the box

  • Balboa 30637 temp/hi-limit combo sensor
  • 96-inch sensor cable with connector
  • Replacement sensor well o-ring (verify inclusion at time of receipt)

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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