"My hot tub won't heat" is the single most common call we run. Most no-heat issues come down to a handful of failure points — and we know them cold.
Get a Free QuoteA spa heater is a small system: an element, a flow path, a high-limit safety, a temperature sensor, and a control board telling all of it what to do. When one piece fails, the others quit. Our diagnostic walks every component in order so we don't replace parts that don't need it. Most heater repairs are wrapped up in a single visit.
You submit a quote request describing what your spa is doing. A real Nashville-based tech responds soon to confirm the appointment. We arrive in a marked truck with common parts on board, run a structured diagnostic, and give you a flat-rate quote before any work begins. Most jobs are done the same day.
We service every major brand on the market — Jacuzzi, Hot Spring, Caldera, Sundance, Marquis, Master Spas, Bullfrog, Dimension One, Cal Spas, Coleman — plus most off-brand and inflatable spas. If you've inherited a spa or aren't sure what you have, send a photo with your quote request and we'll figure it out.
If your spa is doing any of these, this is the right page.
Set temperature shown, pumps running, water never warms. Almost always the heater circuit — element, high-limit, or relay.
Water warms, heater shuts off with an error, refuses to come back. Classic flow problem or high-limit trip.
Overheat code from a tripped high-limit. Usually caused by low flow, not actual overheating.
Heater can't see enough water moving past the sensor. Filter, airlock, or circ pump issue.
Scale on the element or a partially failed circ pump. Both fixable, both diagnosable in one visit.
A cracked element shorting to ground. Replacement is the fix — they aren't field-repaired.
Most heater replacements run $350 to $650 installed, depending on the spa make and whether it's a titanium or standard element.
The housing and plumbing stay; the element inside is the consumable. Once an element is open or shorted, replacement is the standard fix.
Almost always a flow problem upstream — clogged filter, airlock, or weak circulation pump. Replacing the heater without fixing flow leads to a repeat failure.
In Middle TN water, expect 5–8 years with proper chemistry and regular filter care. Hard water and high sanitizer levels shorten that significantly.