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Hi Limit Sensor 79005 - Bubbles Supply

Hi Limit Sensor 79005

Part #: 79005

$63.25
In stock — ships today
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🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this sensor

The Hot Spring Spas 79005 High-Limit Sensor is an OEM replacement temperature sensor designed for Hot Spring spa systems. This critical safety component monitors water temperature and automatically shuts down your spa's heating system when temperatures exceed safe operating limits, preventing overheating damage and ensuring bather safety. The sensor effectively resolves common error codes including HH (high heat), ICE (temperature sensor issues), and OH (overheat) conditions.

At Bubbles Supply, we guarantee this OEM Hot Spring sensor provides an exact fit for your spa's control system. Every 79005 high-limit sensor ships the same day when ordered before our cutoff time and includes our comprehensive 1-year warranty for complete peace of mind. Professional installation by a qualified spa technician is recommended to ensure proper calibration and system integration. Verify your current sensor's part number matches 79005 before ordering to confirm compatibility with your specific Hot Spring spa model.

Exact part number

79005

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Also known as / Replaces

This part replaces or is interchangeable with:

  • Hi-Limit Temp Sensor
  • High Limit Sensor
  • High Temperature Cutoff Sensor
  • Overheat 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 control
  • OH error code displayed on topside control
  • ICE error code displayed on topside control
  • Spa shuts down unexpectedly during normal operation
  • Heater fails to energize despite normal water temperature
  • Spa reads inaccurate water temperature on display

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

Before you buy — quick checklist

  • Confirm the part number on your existing sensor is 79005 before ordering
  • Verify this is the hi-limit sensor and not the temperature sensor — Hot Spring spas use two separate sensors
  • Inspect sensor wiring harness and connector for corrosion or damage before assuming the sensor has failed
  • Clear error codes and test with a known-good sensor reading before replacing, if possible
  • Confirm your spa's control system is Hot Spring OEM — this is not a universal fit 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

  • Hi-Limit Sensor (79005)
  • Attached wiring lead and 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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