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10' Temperature Sensor 34-0203D - Bubbles Supply

10' Temperature Sensor 34-0203D

Part #: 34-0203D

$87.41
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The HydroQuip 10' Temperature Sensor (34-0203D) is an OEM replacement temperature probe designed for HydroQuip control pack systems. This genuine sensor features a 10-foot cable length with a 3/8" bulb for precise temperature monitoring in your spa's heating system. When your spa's temperature readings become inaccurate or your heater won't maintain proper heat levels, this sensor is often the culprit.

At Bubbles Supply, we guarantee this is the exact fit OEM part your HydroQuip system needs, backed by our 1-year warranty and same-day shipping. The 10-foot cable provides flexible installation options while the 3/8" bulb ensures proper thermal contact within your spa's plumbing. Before ordering, verify your existing sensor's cable length and bulb diameter to ensure compatibility with your specific HydroQuip control pack configuration.

Exact part number

34-0203D

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 10ft temperature sensor
  • 34-0203D sensor
  • HydroQuip temp sensor
  • spa temperature probe

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 temperature reads incorrectly on topside display
  • Heater cycles on and off erratically
  • Spa won't hold set temperature
  • Error code indicating sensor fault on control pack
  • Spa overheats or shuts down prematurely
  • Heater won't fire despite correct thermostat setting

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

Before you buy — quick checklist

  • Confirm your control pack is a HydroQuip unit — check the label on the control box
  • Verify your existing sensor cable length is 10 feet — shorter or longer sensors may not route cleanly to the sensor port
  • Check the bulb diameter on your old sensor is 3/8 inch before ordering
  • Test the existing sensor with a multimeter for resistance drift before assuming it's failed — a bad connection is sometimes the cause
  • Note the connector type on your current sensor and compare to product images to confirm it matches your control pack harness

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

  • 10' temperature sensor (34-0203D)
  • Pre-attached connector

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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