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IN.YJ-3 K300 Bundle 0612-300011 - Bubbles Supply

IN.YJ-3 K300 Bundle 0612-300011

Part #: 0612-300011

$1251.88
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this hardware/other

The IN.YJ-3 K300 Bundle is a complete Gecko Alliance heater assembly designed for spa systems requiring reliable heating performance. This OEM bundle includes the IN.YJ-3 heater element paired with IN.K300 controller and IT3 cables, providing everything needed for a proper heating system replacement in compatible spas.

Built to Gecko's exacting standards, this heater bundle effectively resolves common heating issues including HH (high limit) and OH (overheat) error codes that can shut down your spa. At Bubbles Supply, we guarantee an exact fit for your system and ship same-day to get you back to enjoying your spa quickly. Every bundle comes with our comprehensive 1-year warranty for complete peace of mind. Verify your existing heater's part number and electrical specifications match before installation to ensure proper compatibility and safe operation.

Exact part number

0612-300011

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Also known as / Replaces

This part replaces or is interchangeable with:

  • Gecko heater and controller kit
  • IN.K300 heater bundle
  • IN.YJ-3 heater assembly
  • K300 heater bundle

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 (high limit fault) causing spa shutdown
  • OH error code (overheat fault) preventing spa operation
  • Spa water not heating or heating very slowly
  • Heater element failure confirmed by continuity test
  • Controller not communicating with heater assembly
  • Spa cycling on and off repeatedly due to thermal fault

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

Before you buy — quick checklist

  • Confirm your existing heater assembly matches the IN.YJ-3 model designation on the label
  • Verify your spa controller is compatible with the IN.K300 controller included in this bundle
  • Check that your IT3 cable configuration matches what is included in this kit
  • Document your existing HH and OH fault codes before ordering to confirm a heater fault vs. a sensor or flow issue
  • Ensure your spa's electrical supply voltage matches the heater specifications before installation

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

Install difficulty: Hard — Technician recommendedTypically 60-120 minutes

What's in the box

  • IN.YJ-3 heater element
  • IN.K300 controller
  • IT3 cables
  • Manufacturer documentation

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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