Hi-Limit Sensor 73992

Name: Hi-Limit Sensor 73992
Brand: Hot Spring Spas
SKU: 73992
Price: 93.39 USD
Availability: InStock

Part #: 73992

$93.39

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Also replaces

73992

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

About this sensor

The Hi-Limit Sensor 73992 is an OEM replacement safety sensor designed for Hot Spring Spas systems, specifically Hot Spot and Solana series models. This critical component monitors water temperature to prevent overheating by shutting down the heating system when preset limits are exceeded. The genuine Hot Spring part ensures reliable operation and maintains your spa's safety protocols while resolving common fault codes including HH, ICE, and OH error messages.

At Bubbles Supply, we guarantee an exact fit with authentic OEM specifications, backed by our comprehensive 1-year warranty for complete peace of mind. Orders ship same-day to minimize downtime and get your spa operating safely again. This sensor kit includes all necessary components for a complete replacement. Professional installation is recommended to ensure proper calibration and safety compliance, though experienced DIY spa owners can typically complete the replacement with basic tools and spa system knowledge.

Exact part number

73992

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

73992
hi-limit sensor
high limit sensor
overheat sensor
temperature limit sensor
thermal cutoff 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 panel
OH error code displayed on topside panel
ICE error code displayed on topside panel
Heater shuts down unexpectedly before reaching set temperature
Spa goes into overheat lockout with no apparent cause
Spa will not heat despite normal water flow and functional heater element

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

Before you buy — quick checklist

Confirm your spa model is Hot Spot or Solana series before ordering — this is an OEM-specific part
Verify the part number 73992 on your existing sensor or control system documentation
Rule out a failed heater element or flow issue before replacing the sensor — a bad sensor is not always the root cause of HH/OH codes
Inspect the sensor well and wiring harness connector for corrosion or damage before installing the new sensor
Have your spa's wiring diagram available — sensor connector orientation matters during reinstallation

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

Medium — Some experience neededTypically 30–60 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

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