There are a few different CleverSpa HL error code faults to diagnose.

The first is where the HL error is displayed constantly as soon as the pump is powered on. This is usually caused by a faulty temperature probe.

The second is where the pump stops running and the temperature rapidly rises. This is commonly caused by either a faulty impeller or a failed water pump.

The third is where the main body of water overheats above 40°C. This can be caused by either a faulty control panel or a defective PCB circuit board.