Sundance / Jacuzzi Theramax pump replacement
The Theramax and Theraflo circulation pumps quietly run your Sundance or Jacuzzi spa 24/7 — and feed the heater. When one weakens, you get lukewarm water and flow codes. We rebuild or replace it, flat-rate and same-day.
from $239 · $69 diagnostic credited to your repair
The quiet pump that keeps the heat moving
Theramax (and the older Theraflo) are the dedicated circulation pumps used across Sundance and Jacuzzi spas. Unlike a jet pump that roars on demand, a circ pump runs continuously at low speed, gently pushing water through the filter and past the heater so your tub holds temperature without the big pump cycling.
These pumps are often built for Sundance/Jacuzzi by Balboa or LX, so the mechanical failure modes are familiar: a worn shaft seal that weeps water, a seized or noisy bearing, a failed capacitor that leaves it humming, or simply an aging motor that no longer pushes rated flow.
Because the Theramax feeds the heater, a tired one doesn't just go quiet — it starves the heater of flow. That shows up as lukewarm water, a tub that won't reach set temperature, or FLO / OH codes that lock the heater out. We confirm whether it's the circ pump, the heater or a flow switch at the diagnostic before quoting.
The faults we see most
Leaking shaft seal
Water weeps from the wet end — a slow drip that worsens and wets the motor.
Lukewarm water
A weak circ pump can't move enough water past the heater to hold set temp.
Hums but won't spin
A failed capacitor or seized bearing stops the low-speed motor turning over.
FLO / OH codes
Low circulation trips flow and overheat faults that lock out the heater.
Wet end, motor, or a complete circ pump
If the motor still runs true and the pump only leaks, we rebuild the wet end with a fresh seal and o-rings. If the motor has failed, we replace the capacitor or the whole circulation pump with the correct Theramax-compatible unit. Where appropriate we fit a Balboa- or LX-built equivalent that matches flow and fitting exactly.
We size the replacement to your Sundance or Jacuzzi's plumbing and flow needs so the heater sees proper circulation again and the lukewarm complaint goes away.
Seal repair, circ pump, or jet pump
Most Theramax jobs are a wet-end repair or a circulation pump replacement. Confirmed at your $69 diagnostic, credited to the repair.
What's your spa doing?
Answers before you call
It's the circulation pump — it runs continuously at low speed to move water through the filter and past the heater so the tub holds temperature. When it weakens, you lose heat and can trip flow codes.
If the motor runs strong, we rebuild the wet end with a fresh seal and o-rings from $239. If the motor is failing, a circulation pump replacement is the lasting fix. We confirm which at the diagnostic.
Either can cause lukewarm water, which is why we measure flow and test the heater before quoting. A weak circ pump can't push enough water past a perfectly good heater to hold set temp.
Usually yes. These pumps are often Balboa- or LX-built, so we carry compatible units and finish most circulation-pump jobs the same day across Palm Beach County.
Lukewarm Sundance? We'll fix the flow today.
Flat-rate from $239 (seal/wet-end). $69 diagnostic credited to your repair.
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.
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We'll call you back within the hour. Hot tub out cold right now? Call us at (561) 555-0143.