How to Fix Your Dolphin Pool Cleaner if It Doesn’t Climb Properly

A robotic pool cleaner is designed to do more than just clean the pool floor. One of the biggest advantages of owning a Maytronics Dolphin pool cleaner is its ability to climb walls and scrub waterlines for a deeper, more complete clean.

So, when your Dolphin suddenly stops climbing properly, it can be frustrating. The good news is that poor climbing performance is often caused by simple issues that can be fixed at home.

In this guide, we’ll walk through the most common reasons your pool cleaner may struggle to climb and what you can do to get it back to peak performance.

Why Wall Climbing Matters

A robotic pool cleaner that climbs effectively helps remove algae, dirt, oils, and debris from areas that are often missed by manual cleaning. Waterline scrubbing is especially important because this is where sunscreen, body oils, and fine debris tend to build up.

If your pool vacuum only cleans the floor and avoids the walls, your pool may not stay as clean or healthy as it should.

Common Reasons Your Dolphin Pool Cleaner Won’t Climb

Dirty Filter Cartridges or Filter Bag

One of the most common causes of climbing issues is restricted water flow caused by dirty filters. Your Maytronics Dolphin relies on strong suction and water circulation to maintain grip and traction on the pool wall. If the filters are clogged with debris, the unit may lose climbing power.

How to Fix It

• Remove the filter cartridges or filter bag

• Hose them down thoroughly

• Soak them in a filter cleaning solution if oils or calcium buildup are present

• Allow them to dry before reinstalling

Regular filter cleaning keeps your pool cleaner performing efficiently and helps extend the life of the motor.

Worn Brushes or Tracks

Over time, the brushes and tracks on your robotic pool cleaner naturally wear down. When this happens, the cleaner may struggle to grip slippery pool surfaces. This is especially noticeable in pools with smooth fibreglass or tiled finishes.

Signs of Worn Brushes or Tracks

• The cleaner slides down walls

• Climbing is inconsistent

• The unit spins in place

• Reduced traction during cleaning cycles

If the brushes appear flattened or the tracks are loose or cracked, it may be time for replacement parts.

Air Trapped Inside the Cleaner

Air trapped inside the cleaner can affect buoyancy and prevent proper wall climbing.

How to Fix It

Before starting a cleaning cycle:

1. Place the pool cleaner into the water slowly

2. Tilt it side to side

3. Allow trapped air bubbles to escape fully

4. Wait until the cleaner sinks to the pool floor before turning it on

This simple step is often overlooked but can make a major difference.

Pool Water Chemistry Problems

Water balance can affect how well your pool vacuum grips the pool surface. High calcium levels, algae buildup, or slippery biofilm on the walls can reduce traction and make climbing difficult.

Check Your Pool Chemistry

Ensure your pool water is balanced by monitoring:

• pH levels

• Calcium hardness

• Sanitiser levels

• Alkalinity

Keeping your pool water balanced not only improves cleaner performance but also protects your pool equipment and surfaces.

Cable Issues Can Affect Movement

A twisted or tangled cable can restrict the movement of your robotic pool cleaner and reduce its ability to climb walls effectively.

How to Prevent Cable Tangles

• Stretch the cable out in the sun occasionally to relax twists

• Store the cable neatly after use

• Avoid tightly wrapping the cable around the caddy handle

• Use the recommended cable length for your pool size

Proper cable care helps your pool cleaner move freely during operation.

Check the Impeller for Blockages

The impeller is responsible for generating water flow inside the cleaner. If leaves, hair, or debris become stuck, climbing performance can drop significantly.

Cleaning the Impeller

• Turn off and unplug the power supply

• Open the impeller cover if accessible

• Remove any debris carefully

• Rinse thoroughly before reassembling

Always refer to your Dolphin model’s manual before accessing internal components.

Watch This Helpful Video Tutorial

If you’d like a visual walkthrough, this video demonstrates common reasons a Dolphin pool cleaner may not climb properly and how to fix them.

When to Contact Your Elite Dealer

If your Maytronics Dolphin pool cleaner still struggles to climb after trying these troubleshooting steps, it may require professional servicing.

An authorised Maytronics Elite Dealer can inspect:

• Motor performance

• Drive systems

• Internal electronics

• Advanced diagnostics

• Worn internal components

Professional servicing helps ensure your robotic pool cleaner continues operating reliably for years to come.

Keep Your Dolphin Performing at Its Best

Regular maintenance is the key to keeping your pool cleaner climbing, scrubbing, and vacuuming effectively.

By cleaning filters, checking brushes, maintaining balanced water chemistry, and storing your cleaner correctly, you can maximise performance and enjoy a cleaner swimming pool with less manual effort.

A well maintained robotic pool cleaner not only saves time but also helps keep your pool sparkling clean all year round.