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Tropic Seas Heaters

Shop Tropic Seas Spas Heaters and Heater Assemblies

Tropic Seas Spas are built by Artesian Spas on Balboa control systems, so replacement heaters are matched by your spa pack generation and heater specs — not the spa model name. Most replacements come down to wattage (commonly 4.0kW or 5.5kW), tube configuration, and whether your system uses sensors mounted in the heater tube.
When your spa won’t heat, heats slowly, or trips the GFCI when the heat cycle starts, the heater element is one of the first suspects — but flow problems and sensors can mimic heater failure, so a little diagnosis before ordering saves money.
If you own a Tahiti, Waikiki, Oahu, Maui, Fiji, Kona, Rio, Kawai, Hawaii, Lanai, Makai, Tonga, Hana, or Tropic Pool — you’re in the right place.
Visit the Tropic Seas Resource Center for manuals, part guides, and fitment help.
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Circuit Boards | Topside Controls | Jet Pumps | Circulation Pumps | Sanitizing Systems
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Filters | Pillows | Water Care | Misc Parts

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Not 100% sure this is the correct replacement part? Use the fitment verification form below before ordering.

✅ Not Sure It Fits? Verify Before Ordering

Heater compatibility can vary by spa pack model, heater wattage, tube length, fitting style, and sensor configuration.

To help us identify the correct replacement heater, please send clear photos of:

  • Your existing heater assembly and its label if visible
  • Your spa pack or control box label
  • Your spa serial number sticker

EZ Hot Tub Parts can help confirm fitment before you order and help reduce costly returns.

How to Identify Your Tropic Seas Heater

Before ordering, check:

  • Your spa pack model — the heater must match the pack generation (2013–2015 vs. 2017 and newer eras)
  • The heater wattage, commonly 4.0kW or 5.5kW
  • The tube length and fitting size
  • Your spa serial number to confirm the production era

On Balboa-based systems like these, the heater is usually replaced as a complete assembly — tube and element together — which renews the fittings at the same time and is more reliable than swapping the element alone.

No Heat? It Isn’t Always the Heater

No-heat conditions can also come from flow problems, dirty filters, failed sensors, or a board relay not sending power. FLO errors typically point to water flow rather than the element. A GFCI that trips specifically when the heat cycle starts, on the other hand, is a classic shorted-element symptom.

Common Signs of a Failed Heater

  • No heat with pumps running normally
  • Breaker/GFCI trips when heating starts
  • Slow heating or temperature that can’t keep up in winter
  • Visible leaking or corrosion at the heater tube

Repair finished? A drained spa means a fresh startup — stock up on water care before you refill.

Tropic Seas Heaters Frequently Asked Questions

Match the heater to your spa pack generation and wattage. Your control box label and spa serial number are the fastest way to confirm the right assembly.

Very often, yes. A shorted heater element is one of the most common causes of GFCI trips that occur specifically when the heat cycle starts.

FLO indicates a water flow problem — often a dirty filter, low water level, airlock, or a failing flow switch — rather than a bad heater element.

Use the fitment verification form on this page and send photos of your heater assembly, control box label, and spa serial number. We’ll confirm the correct heater before you order.

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