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6.0KW 230V Low Flow Heater 73790 230V - Bubbles Supply

6.0KW 230V Low Flow Heater 73790

Part #: 73790

$576.22
In stock — ships today
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Also replaces

73790
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

This 6.0kW 230V low flow heater assembly (part #73790) is engineered specifically for Hot Spring Spas systems requiring reliable, efficient heating performance. Operating at 230 volts with 6000 watts of heating power, this No Fault heater delivers consistent water temperature while preventing common overheating issues that can damage your spa's electrical components.

Built to exact OEM specifications, this heater assembly ensures perfect compatibility with your Hot Spring spa's plumbing and electrical systems. You get our exact fit guarantee, same-day shipping on in-stock orders, and comprehensive 1-year warranty for complete peace of mind. The low flow design protects against dry firing while maintaining optimal heating efficiency. Professional installation is recommended to ensure proper electrical connections and flow sensor integration with your spa's control system.

Exact part number

73790

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 73790
  • Hot Spring 6kW heater assembly
  • Hot Spring low flow heater
  • No Fault heater 73790

Looking for an older part number? Check our supersession lookup tool

Technical specifications

Voltage
230V

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Spa not heating or heating very slowly
  • HH or OH fault code on spa topside control
  • Heater element failure confirmed by continuity test
  • Spa tripping GFCI breaker due to failing heater element
  • Water temperature drops and won't recover
  • Overheating fault with no apparent flow restriction

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

Before you buy — quick checklist

  • Confirm your spa is running 230V — do not install on a 115V system
  • Verify part number 73790 matches the label on your existing heater assembly
  • Check that your flow issue has been resolved before installing — low flow will damage the new heater
  • Inspect pressure switch and high-limit sensors before replacement, as a failed sensor can mimic heater failure
  • Confirm this is a Hot Spring Spas branded unit — this is an OEM part and fitment outside the Hot Spring lineup is not guaranteed

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

Install difficulty: Medium — Some experience neededTypically 45-90 minutes

What's in the box

  • 6.0kW 230V heater assembly
  • Replacement O-rings or gaskets (if included with 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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