Troubleshooting · Cleaning Performance
Why does my Dolphin keep missing part of the pool?
Short answer: Check cable reach, start your Dolphin in the missed area, and check cycle length, filters, the impeller, tracks, and pool obstacles.
Straighten any twists or bends in the cable. Leave enough length to reach the whole pool, then coil the extra cable on the caddy or lay it beside the pool.
Based on Maytronics support, updated 2026-04-26, rewritten by Poolbots' pool experts. Parts that fix it are below.
The fix
Step by step.
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Step 1Check the cable setup
Straighten any twists or bends. Make sure enough cable is available for your Dolphin to reach every part of the pool. Coil any extra cable on the caddy or lay it alongside the pool.
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Step 2Try a different starting point
At the beginning of the next cycle, place your Dolphin in the area it usually misses. This can change its initial cleaning route and help it clean more effectively.
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Step 3Check cycle length and look for blockages
- Confirm that the cleaning cycle lasts as long as your user manual specifies.
- Check the impeller for blockages.
- Check that the filters are clean and free of clogs.
- Check that the tracks are clear and that nothing is caught in the drive system.
- Look for obstacles in the pool that could block your Dolphin from reaching the missed areas.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
Replacement parts
Parts that fix this.
This answer comes down to filters. The exact part depends on the model: choose your robot and we open its parts list, or browse the category for every model.
Browse by category:Filters All genuine Dolphin parts →
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