Your pool cleaner is meant to make maintenance easier. So when it suddenly stops moving on a hot Perth day, it can quickly become frustrating. The good news is that a robotic pool cleaner not working as it should doesn’t always mean a major repair.
The problem could be as simple as a power issue, clogged filter, jammed impeller, worn tracks or brushes, or a tangled cable. Working through these possibilities in the right order can often help you pinpoint the problem and get your cleaner moving again sooner.
Most of these checks only take a few minutes. If they don’t solve the problem, you’ll have a better idea of when it’s time to stop troubleshooting and have the cleaner professionally assessed.
Key Takeaways
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Start with the basics: Check the power supply and cable connections, clean the filter, clear accessible debris from the impeller and inspect the tracks and brushes before assuming there is a larger fault.
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Let the symptom guide you: A cleaner that won’t move, climb walls, collect debris or finish a cycle can point to different problems, so troubleshoot what the cleaner is actually doing.
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Check for wear and poor grip: Worn tracks or brushes can affect movement and climbing, while algae or slippery pool surfaces can make it harder for the cleaner to maintain traction.
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Know where DIY stops: Cleaning, clearing debris and inspecting wear components are sensible at-home checks. Motor, gearbox, power supply electronics and internal control faults are best left to a technician.
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Don’t assume you need a new cleaner: If the basic checks don’t solve the problem, a professional assessment can determine whether the unit can be repaired or if replacement makes more sense.
Start With the Quick Checks
Before assuming there’s a problem with the motor or internal electronics, start with the basics. These simple robotic pool cleaner troubleshooting checks can help rule out common issues without needing to open the cleaner.
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Reset the control box: Switch the power supply off and unplug it at the wall. Wait 30 seconds, then reconnect it and restart the cleaner. This may clear a temporary electronic fault. Check your owner’s manual for any model-specific reset instructions.
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Clean the filter or canister: Remove the filter, empty any debris and rinse it thoroughly with clean water. A heavily clogged filter can restrict water flow and affect the cleaner’s performance.
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Check the impeller: Hair, leaves and stringy debris can become caught around the impeller and restrict water flow. With the cleaner switched off and disconnected from power, check for and remove any accessible debris.
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Inspect the tracks and brushes: Check the tracks, wheels and brushes for trapped debris, visible damage or excessive wear. Worn components can reduce traction and affect how well the cleaner moves across the pool floor and walls.
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Check the cable and power supply: Make sure the cable is free from obvious twists, kinks or damage and is securely connected. Keep the power supply in a dry, protected location and confirm it is connected to a working power outlet.
Fault by Fault: What to Try First
Once you’ve completed the basics, the way your robotic pool cleaner is behaving can help narrow down the problem. Start with the symptom that best matches what your cleaner is doing.
The Robot Will Not Move
If your pool robot is not moving, make sure it has power before looking for a mechanical problem. Once the power supply and cable connections have been ruled out, look for leaves, small stones or other debris preventing the tracks or wheels from turning freely.
Try this first: Check the power supply and cable connections, reset the control box, then clear any visible debris from around the tracks and wheels.
The Pool Cleaner Will Not Climb the Walls
If your pool cleaner moves normally across the floor but struggles to climb the walls, start with the filter, brushes and tracks. A full or clogged filter can affect performance, while worn brushes or tracks can reduce the grip it needs to climb.
If the filter, brushes and tracks look fine, turn your attention to the pool surface. Algae or a slippery film can make it harder for the cleaner to grip the walls, even when the water looks clear. Check your water chemistry and sanitiser levels, clean any affected surfaces and aim to keep your pool pH between 7.2 and 7.6 to support effective sanitation and help prevent algae growth.
Try this first: Empty and rinse the filter, inspect the brushes and tracks for wear, then brush any slippery build-up from the walls before running the cleaner again.
The Robotic Cleaner Is Not Picking Up Debris
If your robotic cleaner is moving around the pool but leaving dirt and debris behind, start with the filter basket, cartridge or canister. Unlike suction cleaners that rely on the pool’s filtration system, robotic cleaners collect debris as they move, so a full or damaged filter can affect how well they clean.
Look for a build-up of fine debris, tears or other damage that could allow dirt back into the pool. Make sure the filter is also sitting correctly before starting another cycle.
Try this first: Empty and thoroughly rinse the filter, then refit it correctly and run another cycle. If it remains clogged or shows signs of damage, it may be time to replace it.
The Cable Keeps Tangling or Kinking
A twisted or kinked cable can restrict how freely your robotic cleaner moves and put extra strain on the connections. Tight coiling during storage can also encourage twists and kinks to form over time, so keep the cable loosely stored when the cleaner isn’t in use.
Try this first: Disconnect the cleaner and gently straighten the cable, checking for visible damage around the connection points as you go. If it continues to tangle, the cable or swivel assembly may need further inspection.
It Floats or Will Not Sink
If your robotic cleaner floats, tips to one side or takes a while to settle on the pool floor, trapped air may be the cause. This can happen when the cleaner is first placed in the water or after the filter has been removed for cleaning.
Try this first: Fully submerge the cleaner and gently tilt it from side to side until the air bubbles stop escaping. Allow it to settle on the pool floor before starting the cleaning cycle.
It Starts, Then Stops Mid-Clean
If your robotic cleaner starts normally but stops before completing its cycle, a clogged filter, restricted impeller or debris caught around the tracks or wheels could be interrupting its operation.
If those areas are clear, the problem may need further investigation. Warning or error indicators on the power supply can provide a clue, although these vary between models and should be checked against your cleaner’s manual.
Try this first: Clear any visible obstructions and run another cycle, noting when the cleaner stops and whether an error or warning appears. If the problem continues, it may need professional diagnosis.
The Power Supply Light Is Flashing or Off
If the power supply light is off or flashing, the issue may be with the power source, cable connection or the unit itself. Warning lights and error codes vary between models, so check your cleaner’s manual for what the indicator means.
Avoid opening the power supply or attempting to repair its internal components yourself.
Try this first: Confirm the outlet is working, check the connections and reset the power supply. If the light remains off or the warning continues, have the cleaner and power supply professionally assessed.
What Worn Tracks, Brushes and Filters Look Like
Tracks, brushes and filters naturally wear over time. How quickly depends on how often the cleaner runs, the pool surface and the amount of debris it handles, so condition is a better guide than a fixed replacement schedule.
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Brushes: Flattened, split or noticeably worn brushes may no longer make good contact with the pool surface. Some models also have wear indicators to show when replacement is due.
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Tracks: Look for stretching, damage or worn tread, particularly if the cleaner has started slipping or struggling for grip. Tracks that no longer fit or grip correctly may need replacing.
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Filters: Tears, damaged filter material, persistent clogging or a basket or canister that no longer seals correctly can affect debris collection and allow dirt back into the pool.
If several parts are showing their age alongside mechanical or electrical faults, it may be worth weighing up a repair against choosing an automatic pool cleaner to replace it.
DIY Fix or Repair Job? Where the Line Sits
There are plenty of robotic pool cleaner issues you can safely tackle at home. Cleaning the filter, clearing accessible debris and checking cables, tracks and brushes are all part of routine maintenance.
Once the problem appears to be inside the cleaner or power supply, it’s best to stop there. Faults involving the motor, gearbox, power supply electronics or internal control components are better left to a technician.
Avoid opening sealed housings or attempting internal electrical equipment repairs yourself. Doing so could cause further damage and may affect the manufacturer’s warranty.
When to Stop Troubleshooting and Book a Repair
If the basic checks haven’t solved the problem, it’s worth having the cleaner assessed before attempting a more involved repair.
Pool Assist repairs Dolphin pool cleaners by Maytronics and Zodiac robotic pool cleaners locally in Perth. We can identify the fault and let you know if the cleaner is worth repairing or if replacement makes more sense.
Get Back to Swimming Sooner
A robotic pool cleaner not working properly doesn’t always mean you need a new machine. A few simple checks can often uncover the problem, and knowing when to stop troubleshooting can help prevent a small issue becoming a more expensive repair.
If your cleaner still isn’t working as it should, book an equipment repair with Pool Assist, bring it into our Myaree store or call us on 1300 628 262. We’ll assess the fault and help get it back in the pool sooner.
Frequently Asked Questions
Q. How long should a robotic pool cleaner last?
A. There isn’t one fixed lifespan for every robotic pool cleaner. How long yours lasts will depend on the model, how often it is used, the pool environment and how well wear components are maintained. Replacing filters, brushes and tracks when needed can help maintain performance, while recurring motor or electronic faults on an older cleaner may make replacement worth considering.
Q. Should I leave my robotic pool cleaner in the pool all the time?
A. Check the manufacturer’s instructions for your particular model, as recommendations can vary. Removing the cleaner when it isn’t in use also allows you to empty the filter, inspect the cable and check tracks and brushes for wear before the next cleaning cycle.
Q. How often should I clean my robotic pool cleaner filter?
A. The filter should be checked regularly and cleaned whenever debris begins to build up. Pools with heavy leaf litter, fine dust or frequent use may require the filter to be cleaned more often. Keeping it clear helps maintain water flow and allows the cleaner to collect debris effectively.
Q. Is it worth repairing an older robotic pool cleaner?
A. It depends on the age of the cleaner, the fault and the cost of the repair. Replacing normal wear components such as tracks, brushes or filters can make sense when the rest of the cleaner is in good condition. If an older unit develops more significant mechanical or electronic faults, comparing the repair cost with replacement is worthwhile.
Q. Can a robotic pool cleaner work if the pool water is green?
A. A robotic cleaner can remove loose debris from the pool, but it isn’t a substitute for correcting an algae or water chemistry problem. Green water needs to be properly treated and filtered, with the water balance and sanitiser brought back under control. Once the underlying water problem has been addressed, the cleaner can help remove remaining debris from pool surfaces.
Note: This post was originally published on May 18, 2018 and has been updated on September 08, 2026.