AquaCal pool heat pump being serviced beside a Long Island inground pool

AquaCal Pool Heat Pump Service

AquaCal Pool Heat Pump Repair on Long Island

AquaCal HeatWave throwing an alarm or not heating? We service and repair AquaCal pool heat pumps with real HVAC techs and manufacturer diagnostics across Suffolk County.

AquaCal is one of the most common pool heat pump brands on Long Island, and its HeatWave SuperQuiet line shows up in a lot of Suffolk County backyards. AquaCal built its reputation on the titanium heat exchanger, which handles pool water chemistry well, but the control board, sensors, and refrigerant circuit still need a real HVAC tech when something goes wrong.

The alarm we get asked about most is OTA, the over-temp alarm. It reads like a scary fault but it is very often a water-temperature sensor reading high rather than an actual overheating unit, so the fix is usually a sensor, not a compressor. Beyond that, we see water-flow faults, refrigerant that leaked over the winter, and freeze faults at cold spring startup. We diagnose with manufacturer data, decode the alarm properly, and quote flat-rate before any work.

We service the AquaCal HeatWave SuperQuiet, TropiCal, and Great White lines, all built around AquaCal's titanium heat exchanger.

AquaCal pool heat pump outdoor unit on Long Island

What We Fix


Common AquaCal Pool Heat Pump Problems We Repair

OTA Over-Temp Alarm

The alarm AquaCal owners ask about most. It looks alarming but usually traces to a water-temperature sensor reading high, not an actual overheating unit. The fix is often a sensor, not the compressor. We confirm which before touching anything.

Water Flow Faults

The unit reads no or low water moving through the heat exchanger and locks out. Common at opening when the pump or plumbing changed. Usually a flow sensor or plumbing issue.

Refrigerant Leaks

Charge drifts off over an idle winter, leaving weak or no heat. We find the leak, repair, evacuate, and recharge the titanium-exchanger circuit to spec with EPA-certified handling.

Freeze and Sensor Faults

Cold Long Island spring water and cool nights can trigger freeze-protection lockouts on a healthy unit. Sometimes a sensor, sometimes a board calibration problem.

Why an HVAC Tech


A AquaCal Pool Heat Pump Is Still a Heat Pump

Most pool service companies don't hold a refrigerant license or carry manufacturer service tools. We do this work every day on home heat pumps and ductless mini splits, so the AquaCal water-side piece is the small new part, not the hard part. See our full pool heat pump service.

AquaCal Pool Heat Pump Down?

Text Us and We'll Get a Tech to You.

Reach us at (631) 209-7090 by text or call. We'll ask a few questions about what your AquaCal unit is doing and schedule you the same day or next morning.

Text (631) 209-7090

Common Questions


AquaCal Pool Heat Pump Repair FAQs

Usually not. OTA is AquaCal's over-temp alarm, and while it needs to be checked, it very often traces to a water-temperature sensor reading high rather than an actual overheating unit. In a lot of cases the fix is replacing a sensor, not the compressor. We confirm the real cause with manufacturer diagnostics before recommending any repair.

Yes. We service the HeatWave SuperQuiet, TropiCal, and Great White lines, all of which use AquaCal's titanium heat exchanger. We know the care that exchanger needs and the alarms these units throw.

Most repairs run between $250 and $1,200 depending on the failure. A sensor replacement behind an OTA alarm is on the low end, flow faults are mid-range, and refrigerant leak repair with recharge runs higher. We give you a flat-rate quote before any work begins.

Most pool heat pumps last 10 to 15 years on Long Island depending on water chemistry and winterizing. If yours is past 10 years and the repair is over half the replacement cost, replacement usually wins, and a newer unit is noticeably more efficient. We give you both numbers.

Other Brands We Service


We Repair Every Major Pool Heat Pump Brand