Hot tub circulation pump replacement
The quiet 24/7 circulation pump (often a Laing or Grundfos) is what feeds water to your heater. When it weakens you get FLO, HL and OH codes and lukewarm water. We replace it flat-rate, same-day in most of the county.
from $389 · $69 diagnostic credited to your repair
The little pump that quietly runs your spa
Most modern hot tubs have two kinds of pump: the powerful jet pumps you feel when you hit the buttons, and a small, quiet circulation pump that runs almost continuously in the background. While the jet pumps move a lot of water on demand, the circ pump's job is gentle and constant — it keeps a steady trickle of water moving through the filter, the ozone or sanitizer, and crucially, across the heater.
That heater connection is why a tired circ pump causes so much grief. Your heater only fires when it senses water flowing past the element, and it relies on the circ pump to provide that flow. As the circ pump weakens — these are typically sealed Laing or Grundfos units that run for years before wearing out — it moves less and less water, and the spa starts throwing the codes that point at flow: FLO as the flow switch loses confidence, HL as flow drops too far, and OH as the slow trickle lets the element superheat locally.
The other tell is heat itself. A circ pump that can't move its rated volume leaves the water lukewarm — the heater is fine, but there isn't enough flow to carry the warmth into the tub. Because these pumps are sealed cartridge units, a worn one is generally replaced rather than rebuilt, and matching the correct model and flow rate to your spa is the heart of the job.
The pattern that points here
A failing circ pump rarely dies dramatically — it fades. The classic signature is a spa that has slowly become unreliable about heat and started showing flow codes that come and go, especially as the pump warms up through the day. If you've already ruled out a dirty filter and low water and the codes persist, a weak circ pump is a leading suspect.
You can sometimes hear it: a healthy circ pump is nearly silent, so a new buzzing, ticking or surging from that small pump — or a circ pump that runs hot to the touch — is a sign it's struggling. Some fail intermittently, working when cold and faulting once heated, which is why an on-site flow measurement is the reliable confirmation rather than guesswork.
Replacing it restores the steady flow the heater needs, which clears the flow-related codes and brings the water back up to a proper temperature. We confirm the diagnosis by measuring actual circulation flow, match the correct sealed pump for your spa, and verify the heater fires and holds before we leave.
Confirm the circ pump, match the unit, restore steady flow
Confirm
We measure actual circulation flow and rule out filter, valves and air lock so we know the circ pump itself is the cause.
Flat quote
Once confirmed, you get the published price up front for the correct replacement — the $69 diagnostic credited 100%.
Replace
We fit the right sealed circ pump (Laing, Grundfos or equivalent) matched to your spa's flow rate and plumbing.
Verify
We confirm the flow codes are gone, the heater fires, and the water reaches and holds its set-point before we leave.
Most circulation pump replacements are completed same-day across Palm Beach County.
Why a circ pump usually gets replaced, not rebuilt
Most spa circulation pumps are sealed cartridge units — there's no shaft seal or bearing set to service the way a big jet pump has. When the motor or impeller wears, replacing the whole unit is both the standard repair and the better value than chasing parts. We match it correctly so the heater gets exactly the flow it expects.
Flat-rate, published up front
A circulation pump replacement, or a wet-end repair if your spa uses a serviceable circ pump — confirmed at your $69 diagnostic.
Not quite your symptom?
Answers before you call
It's the small, quiet pump that runs almost constantly, moving a steady trickle of water through the filter, sanitizer and — most importantly — across the heater. The heater only fires when it senses that flow, so the circ pump keeps your spa heated and filtered between soaks.
The signature is recurring flow codes (FLO, HL, OH) and lukewarm water once you've ruled out a dirty filter and low water. A circ pump that's gone from silent to buzzing or surging, or that runs hot, is also a strong sign it's wearing out.
Most are sealed cartridge units with no serviceable seal or bearings, so a worn one is replaced as a whole unit — that's the standard repair and the better value. If your spa uses a serviceable circ pump, a wet-end repair may be an option, which we confirm on site.
From $389 for the replacement, matched to your spa's flow rate. A wet-end repair applies only if your circ pump is the serviceable type. You get the flat price before we start.
Same-day across most of Palm Beach County, with a real arrival window rather than a vague all-day wait.
We'll confirm the circ pump and replace it — today.
Flat-rate from $389. Same-day. $69 diagnostic credited to your repair.
Tell us the codes you're seeing — we'll call back within the hour
No call center. Just a local, licensed tech who'll measure your circulation flow and quote the price before any work.
Quote request sent
We'll call you back within the hour. Hot tub out cold right now? Call us at (561) 555-0143.