Cleverspa Repairs Service

Seeing HL on a Cleverspa hot tub usually means the unit believes it’s overheating or detecting an unsafe heating condition — so it shuts down to protect itself.

Why HL can happen (the most common causes)

1) Constant HL often needs pump or probe attention
A repeated HL fault is very often linked to either the pump side (circulation problems) or the temperature probe / sensor giving incorrect readings.

2) Fast temperature rise
If your tub shows a rapid temperature increase (or “jumps” in temperature), the heater can trigger HL because it thinks the water is heating too fast or not moving correctly past the heater.

3) Impeller or water pump issues (restricted flow)
A worn, damaged, or slipping impeller — or a weak/failed water pump — can reduce water flow through the heater.
Low flow = heat builds up in the heater area = HL triggers.

4) Water level over the heater / control panel area
Make sure the main body of water isn’t sitting too high over the heater/control pack area (especially if the unit has been moved, tilted, or is sat unevenly). If water is affecting the control area or circulation path, it can contribute to strange behaviour, sensor errors, and repeated HL shut-downs.

What you can try before booking a repair (safe checks)

• Clean or replace the filter

• Ensure proper water level (not too low, not flooding the control area)

• Check for strong jet/return flow

• Power off at the mains for a few minutes, then restart (only after checking the flow)

If HL keeps coming back, it usually needs proper testing of the circulation system and sensor readings — and that’s exactly what we do during the repair process.