Balboa M7 heater replacement
The Balboa M7 is the most common flow-through heater in the spa world. We replace its element or the complete assembly — Incoloy or Titanium — upfront and same-day.
from $589 · $100 diagnostic, paid up front & credited
The universal flow-through heater
The Balboa Water Group M7 is a 15-inch stainless flow-through heater tube — typically 4.0 or 5.5 kW — used across a huge range of spas because so many tubs run Balboa control systems. If your spa pack says Balboa, there's a good chance the heater is an M7 or a direct equivalent.
Inside the tube is the heating element; on the tube are the high-limit and temperature sensors and the connections to the board. When an M7 fails, it's usually the element (open-circuit so it won't heat, or grounded so it trips the GFCI), or a sensor/flow-switch fault that stops the heater from firing safely.
Because the M7 is so standardized, we stock it. That means most M7 jobs — element or complete assembly — are a same-day fix across Palm Beach County.
The faults we see most
Open element — no heat
The element burns open and stops heating, often with no error code at all.
Grounded element — trips breaker
A cracked element leaks to ground and trips the GFCI the moment the heater fires.
Sensor / high-limit faults
SN or OH codes from a drifting sensor or a high-limit tripping on low flow.
Scale-clogged tube
Hard-water scale chokes flow and overheats the tube — common on neglected spas.
Which element belongs in your M7?
The M7 takes either an Incoloy element (the standard) or a Titanium one. Incoloy is fine for conventionally sanitized fresh water. But in Florida — where saltwater spas and aggressive chemistry are everywhere — Incoloy corrodes and fails early.
If you run salt or your last element didn't last, we'll fit a Titanium element. It costs a little more upfront and pays for itself in lifespan. We'll show you both prices and let you choose.
Element or complete assembly
We replace just the element when the tube is sound, or the complete M7 when it isn't. Confirmed at your $100 diagnostic.
Other heater parts we replace
Titanium element upgrade
The saltwater-spa upgrade — titanium outlasts Incoloy in Florida water.
Heater partGecko heater
The flow-through heater in Gecko in.xm and SSPA packs — element or assembly.
Heater partHydro-Quip heater
The huge universal element and assembly range, plus the HeatMax box.
Heater partWatkins No-Fault heater
The proprietary titanium heater in Hot Spring, Caldera, Tiger River & Limelight.
Heater partSundance / Jacuzzi heater
The proprietary titanium Smart Heater in Sundance and Jacuzzi spas.
Answers before you call
Both. If the stainless tube and housing are sound, we replace just the element from $289. If the tube is corroded or scaled through, a complete M7 assembly is the lasting fix at $589 (Incoloy) or $709 (Titanium).
If your spa pack or topside reads Balboa, the heater is very likely an M7 or a direct equivalent. Send us a photo of the equipment and we'll confirm before we come out.
Titanium for saltwater spas or anywhere chemistry runs hot — it lasts far longer in Florida water. Incoloy is fine for standard fresh-water sanitizing. We carry both.
Usually yes — it's the most common spa heater, so we stock elements and complete assemblies and finish most M7 jobs the same day.
We stock it — and we'll fix it today.
Starting at $289 (element) or $589 (assembly). $100 diagnostic credited.
Tell us what's wrong — we'll call you back within the hour
No spam, no call center. Just a local tech who knows hot tubs and tells you the price before the work.
Quote request sent
We'll call you back within the hour. Hot tub out cold right now? Call us at (561) 794-1557.