Troubleshooting guide
Dolphin pool robot not working
Most Dolphin pool robot problems come down to one of a handful of causes — power, suction, movement, or a worn part. Use the quick checks below to identify your issue, then follow the relevant guide for a step-by-step fix.
Quick Diagnosis
Work through these to narrow down your issue:
- Is the power supply showing any lights at all?
- Is the robot moving but just not cleaning well, or is it completely still?
- Did the robot stop mid-cycle, or did it never start?
- Is the power supply LED blinking — and if so, how many times?
- Can you spin the tracks and impeller freely by hand with no grinding or resistance?
- Is the cable heavily tangled or kinked near the connector?
- When did the robot last have its filter cleaned?
Find Your Issue
General Troubleshooting Steps
- 1
Start at the power supply — check the indicator light, try a different outlet, and press the reset button if the outlet is GFCI-protected.
- 2
Disconnect and reseat the floating cable connector at both ends. Corrosion or a loose connection causes more problems than most owners expect.
- 3
Remove the robot and clean the filter. A clogged filter is behind a large share of suction, wall-climbing, and mid-cycle shutoff issues.
- 4
Flip the robot over and spin the tracks and impeller by hand. Both should rotate freely with no grinding or stiffness.
- 5
Straighten the full cable on the pool deck before the next run. A coiled or kinked cable causes tangling, drag, and in some cases power faults.
- 6
If nothing obvious is found, perform a full reset: unplug the PSU from the wall, disconnect the cable, wait 90 seconds, then reconnect.
When to Replace
The power supply typically fails first and usually lasts 3 to 5 years. Brushes and drive belts wear out within a few seasons depending on use and pool conditions. The floating cable is vulnerable to cracking at the connector end. If the robot is more than 5 years old and showing multiple issues at once, the cost of repair may approach the cost of a replacement unit — worth considering before ordering several parts.
Key Takeaways
- Check the power supply indicator light before anything else — it tells you most of what you need to know.
- A clogged filter contributes to more faults than most owners realise — clean it before each cycle.
- Most Dolphin problems are mechanical or electrical and can be diagnosed in under 10 minutes with no tools.
- Use the issue list above to navigate to the specific guide for your problem.
Frequently Asked Questions
Why did my Dolphin pool robot suddenly stop working?
Sudden failures are most commonly caused by an overheating power supply, a tripped GFCI outlet, or a blocked impeller triggering the overload protection. Start by checking the PSU indicator light and the wall outlet before assuming the robot itself has failed.
Is it worth repairing a Dolphin pool robot?
In most cases yes, especially for robots under 5 years old. Power supplies, brushes, drive belts, and cables are all available as replacement parts at a fraction of the cost of a new robot. If the motor or control board has failed on an older unit, the repair cost may be harder to justify.
How long should a Dolphin pool robot last?
With regular cleaning and proper storage, most Dolphin robots last 5 to 7 years. Drive belts and brushes need periodic replacement. The power supply is typically the first major component to fail.
Looking for a general overview? All Dolphin pool robot guides →