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Replacement Sensor Kit 34-01395-K - Bubbles Supply

Replacement Sensor Kit 34-01395-K

Part #: 34-01395-K

$121.10
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The HydroQuip Replacement Sensor Kit 34-01395-K is an aftermarket temperature sensor assembly designed for Watkins spa systems. This complete kit includes the temperature sensor needed to restore proper heating control and eliminate common error codes like HH (high heat), ICE (freeze protection), and OH (overheat) conditions that can shut down your spa.

Built to HydroQuip's exacting standards, this sensor kit delivers the exact fit and reliable performance your spa demands. At Bubbles Supply, we back every sensor with our 1-year warranty and guarantee same-day shipping to get your spa running quickly. The precise temperature monitoring capabilities ensure your heating system operates safely within proper parameters. Professional installation is recommended to ensure correct sensor placement and proper system calibration for optimal spa performance.

Exact part number

34-01395-K

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Also known as / Replaces

This part replaces or is interchangeable with:

  • hi-limit sensor kit
  • HydroQuip temp sensor kit
  • spa temperature sensor assembly

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 triggering spa shutdown
  • ICE warning activating incorrectly
  • Spa not reaching or holding set temperature
  • Heater cycling off prematurely
  • Spa locked out with no heat output

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

Before you buy — quick checklist

  • Confirm your control system is a HydroQuip unit before ordering
  • Verify your existing sensor connector style matches this kit — compare photos carefully
  • Check whether your system uses one sensor or two (hi-limit and temperature are sometimes separate)
  • Note the error code your spa is throwing — HH, OH, and ICE can sometimes point to the hi-limit sensor rather than the temp sensor
  • Inspect the sensor well or thermowell for corrosion or damage before installing a 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

  • Replacement temperature sensor
  • Connector/lead assembly

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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