Why does my Dolphin start and then stop?

This can be caused by an obstruction, cable issue, power supply issue or internal fault. Check for visible blockages and confirm the power supply is stable before requesting support.

Can dirty filters stop a Dolphin from cleaning properly?

Yes. Blocked filters reduce water flow and can limit navigation, suction and overall cleaning performance.

Can worn brushes affect cleaning performance?

Yes. Worn brushes, tracks or rollers can reduce traction and make it harder for the cleaner to scrub, climb and cover the pool properly.

Should I repair or replace my Dolphin pool cleaner?

That depends on the age, condition and fault. Pooltronics can inspect the cleaner and provide a recommendation before repair work begins.

Can I use genuine replacement parts?

Yes. Genuine Dolphin spare parts help maintain compatibility and performance.

The Complete Guide to Dolphin Pool Cleaner Troubleshooting

Dolphin robotic pool cleaners are reliable machines, but like any pool equipment they can occasionally need troubleshooting. This guide explains the most common problems Pooltronics customers ask about, including power supply issues, a cleaner that will not move, poor cleaning performance, blocked filters and worn brushes.

Before booking a repair, start with a few safe visual checks. Confirm the power supply is receiving power, inspect the cleaner for obvious obstructions, clean the filter basket or bag, and check whether brushes, tracks or rollers are worn. If the issue continues, Pooltronics can help with technical support, genuine spare parts and professional Dolphin robotic pool cleaner repairs.

Quick Troubleshooting Checklist

Confirm the power outlet is working.
Check the power supply indicators.
Clean the filter basket or panels.
Inspect brushes, tracks and rollers.
Look for obstructions around the impeller.
Record the model and fault before requesting support.

Safety first: disconnect the cleaner from the power supply before removing debris or inspecting accessible parts. Do not open sealed electrical components or attempt internal electrical repairs.

Dolphin robotic pool cleaner being checked during troubleshooting

Quick Checks Before Troubleshooting

If your Dolphin has stopped working, starts and stops, or is no longer cleaning properly, begin with these checks:

Confirm the power point is working by testing another appliance.
Check whether the power supply light turns on.
Remove the cleaner from the pool and inspect underneath for leaves, sticks, toys or other obstructions.
Clean the filter basket, filter panels or filter bag.
Inspect brushes, rollers and tracks for visible wear.
Check whether the cleaner is still within warranty before attempting any repair.

Problem 1: The Power Supply Will Not Turn On

If the power supply does not turn on, first confirm that it is connected to a working power point. Plug in another portable appliance to confirm the outlet has power.

If the power point does not work, contact a qualified electrician. If the power point works but the Dolphin power supply still does not respond, the issue may be with the power supply or cable and should be checked by a technician.

Dolphin robotic pool cleaner power supply troubleshooting check

Problem 2: The Power Supply Works but the Cleaner Is Not Moving

If the power supply turns on but the Dolphin robotic cleaner does not move, remove the cleaner from the pool and perform a careful visual inspection. Look inside and underneath the cleaner for obstructions around the impeller, brushes, tracks and wheels.

If you find debris or an obstruction, remove it and test the cleaner again. If the Dolphin starts and continues to operate normally, the obstruction was likely the cause. If no obstruction is visible or the cleaner still does not move, contact Pooltronics for further diagnosis.

Dolphin robotic pool cleaner inspection when the cleaner is not moving

Problem 3: The Cleaner Runs but Does Not Clean Properly

If your Dolphin is moving but the pool is not being cleaned properly, the most common causes are reduced water flow or reduced traction.

Start by checking the filter basket, filter panels or filter bag. A full or blocked filter can limit water flow and reduce cleaning performance. If the filter is clean and in good condition, inspect the brushes, rollers and tracks. Worn brushes or rollers can reduce grip and prevent the cleaner from climbing or covering the pool effectively.

If filters are clean and brushes are in good condition but cleaning performance is still poor, the cleaner may require professional diagnosis.

What to Record Before Requesting Support

Dolphin model and serial number
What happens when the cleaner is switched on
Whether the power supply lights or indicators appear
Any unusual noise, repeated stopping or movement problem
When the filters, brushes, tracks or rollers were last cleaned or replaced
Clear photos or a short video of the fault where practical

When to Contact Pooltronics

Contact Pooltronics if your Dolphin cleaner has power but will not move, starts and stops repeatedly, shows no obvious obstruction, has worn parts, or continues to underperform after cleaning the filters. We can assist with genuine Dolphin pool cleaner spare parts, technical advice and professional repair options.