Troubleshooting · Troubleshooting
Why isn't the EON 100/120d cleaning the sun ledge and steps?
Short answer: Start facing the ledge or steps in Full Coverage mode with Maze scanning, then check the filter, software updates and 8-inch minimum water depth.
Place the robot on the pool floor with its front facing the sun ledge or steps. Start a cycle in Full Coverage mode with the Maze scanning setting.
Based on Maytronics support, updated 2026-04-23, rewritten by Poolbots' pool experts. Applies to 1 model. Parts that fix it are below.
The fix
Step by step.
If your Dolphin EON 100 misses the sun ledge or steps, cannot reach them, or leaves them dirty, work through these checks in order.
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Step 1Position the robot toward the ledge or steps
Before starting, set the robot on the pool floor with its front pointed toward the sun ledge or steps.
Choose Full Coverage mode and the Maze scanning setting. This setup helps the robot focus on climbing and cleaning those areas early in the cycle.
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Step 2Rinse the filter basket
A clogged basket can weaken suction and make climbing harder.
Remove the basket and rinse it thoroughly with a hose. A clean filter should look white. If it still looks brown or green, keep rinsing until it is clean.
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Step 3Update the app and robot software
Check that you have the latest version of the Maytronics One app. Install an app update if one is available.
If the app asks you to update the robot’s software, finish that update before starting the next cleaning cycle. Older software can affect how the robot navigates and climbs.
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Step 4Check the water depth
While the robot is on the sun ledge, check whether water flows out of its top. If it does not, the water may be too shallow.
The robot needs at least 8 inches (20 cm) of water depth. Shallower water can keep it from working properly on ledges or steps.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
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