Robotic pool cleaners are incredibly convenient — until they stop working. If your Zodiac, Maytronics, Polaris, or Hayward pool robot isn't performing as it should, you're not alone. Here are the five most common problems we see at our Perth repair workshop, and what you can do about them.
1. Pool Robot Won't Move or Climb Walls
This is the number one issue we encounter. If your robotic pool cleaner sits at the bottom of the pool or moves sluggishly, the culprit is usually worn drive tracks or belts. Over time, the rubber tracks lose grip, especially in Perth's hot climate where UV exposure accelerates wear.
What to check: Inspect the tracks for cracks, stretching, or smooth spots. Also check for debris wrapped around the drive wheels or axles. If the tracks look worn, they'll need replacing — a straightforward repair that restores full mobility.
2. Poor Suction or Cleaning Performance
If your pool robot is moving but leaving debris behind, the filter system is likely the issue. Clogged filter cartridges, torn filter bags, or a worn impeller can all reduce cleaning performance dramatically.
What to check: Remove and clean the filter basket or bag after every use. Hold it up to the light — if you can see tears or the mesh is stretched, it's time for a replacement. For deeper issues, the internal pump or impeller may need professional inspection.
3. Cable Tangles and Floating Cable
A robotic pool cleaner that constantly tangles its cable is frustrating. This usually indicates a swivel joint issue or a programming fault that's causing the robot to spin in one direction repeatedly.
What to check: Ensure the cable swivel rotates freely. Lay the cable out straight in the sun for 30 minutes to remove any memory coiling. If the cable itself is damaged or the swivel is seized, these components can be replaced by a specialist.
4. Power Supply Faults
Your pool robot's power supply (the box that plugs into the wall) is a common failure point. Symptoms include the robot not turning on at all, intermittent operation, or the power supply showing error lights.
What to check: Make sure the power supply is in a dry, ventilated area — never in direct sunlight or enclosed spaces where heat builds up. Check that all cable connections are secure. Many power supply failures in Perth are heat-related, so relocating the unit to a shaded spot can prevent future issues.
5. Waterline Staining and Brush Wear
If your robot is running but leaving a visible waterline or not scrubbing tiles effectively, the brushes are likely worn down. PVA brushes (common on Maytronics Dolphins) wear faster in heavily chlorinated pools.
What to check: Remove the brush assembly and check for wear. If the bristles are flat or the PVA foam is thin, replacement brushes will make a noticeable difference to cleaning quality.
When to Call a Professional
While basic maintenance like filter cleaning and cable management can be done at home, electrical faults, motor issues, and internal pump failures should always be handled by a qualified technician. Attempting DIY repairs on electrical components can void your warranty and create safety risks.
At Pool Robot Rescue, we specialise in repairing all major brands of robotic pool cleaners across Perth's northern suburbs. We offer free pickup and delivery, transparent pricing with our $150 assessment fee (fully deductible from your repair cost), and a 12-month warranty on all repairs.
Book a repair online or contact us at help@poolrobotrescue.au to get your pool robot back in action.