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46" Capillary x 3/8" Bulb Thermostat 75077 - Bubbles Supply

46" Capillary x 3/8" Bulb Thermostat 75077

Part #: 75077

$249.35
In stock — ships today
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Also replaces

75077
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

This 46" capillary thermostat with 3/8" bulb is an OEM Eaton mechanical sensor designed for Hot Spring Spas systems. The extended 46-inch capillary length provides precise temperature monitoring and control, while the 3/8-inch bulb ensures accurate thermal response. This genuine replacement part addresses common spa issues including heating problems (HH), ice mode activation (ICE), and overheating conditions (OH).

As an authentic Hot Spring Spas component, this thermostat delivers exact fit guaranteed performance with our same-day shipping and comprehensive 1-year warranty. The mechanical design offers reliable operation without electronic components that can fail over time. Professional installation recommended to ensure proper capillary routing and bulb placement for optimal temperature control and system safety.

Exact part number

75077

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 75077
  • bulb thermostat
  • capillary thermostat
  • Eaton thermostat
  • high-limit thermostat
  • mechanical thermostat

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 (high heat) error code
  • Spa stuck in ICE mode or displaying ICE error
  • Spa displaying OH (overheating) fault
  • Spa not heating to set temperature
  • Spa cycling off prematurely due to false temperature readings
  • Inconsistent water temperature despite correct thermostat setting

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

Before you buy — quick checklist

  • Confirm your spa model uses a 3/8" bulb diameter — verify against your existing thermostat before ordering
  • Measure your existing capillary length — this is a 46" capillary, confirm it matches the routing in your equipment bay
  • Verify the fault code you're seeing (HH, ICE, or OH) — these can also be caused by a faulty sensor or flow issue, not always the thermostat
  • Inspect the capillary tube on your current thermostat for kinks, cracks, or corrosion before assuming the thermostat is faulty
  • Check whether your spa is still under manufacturer warranty before purchasing a replacement part

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

Install difficulty: Medium — Some experience neededTypically 45-90 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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