Robot Pool Cleaner Not Picking Up Debris? Fixes

What is going wrong

• 1Nowhere to put itOnce the media is full the machine keeps driving and stops collecting, which is why it looks like it is working.
• 2What is leftFine debris passing straight through means the media is too coarse for the load, not that the machine missed it.
• 3The impellerA blocked impeller ends pickup outright while the drive carries on.

The usual causes

• Full or clogged filter. Once the basket or cartridge fills, water and debris can no longer flow through, so the cleaner stops collecting even while it keeps moving.
• Jammed impeller. Leaves, hair, or pebbles caught around the impeller cut suction sharply.
• Worn or flattened brushes. Brushes that have worn down cannot agitate dirt loose from the floor and walls, so it is never lifted into the intake.
• Wrong filter grade. A coarse filter passes fine silt and sand straight back into the water, while a fine one can blind quickly on large debris.
• Poor floor contact. Worn tracks or tires that slip stop the unit from pressing debris toward the intake.

Steps to try

1. 1

   Filter clear

   Empty and rinse the filter.

   Remove the basket or cartridge and clear it fully after every use. Rinse cartridges with a hose, and replace any that stay gray or stiff after cleaning.

2. 2

   Impeller clear

   Clear the impeller.

   With the unit unplugged, open the intake area per your model and remove anything wound around or lodged in the impeller. Turn it by hand to confirm it spins freely.

3. 3

   Tracks checked

   Inspect the brushes.

   Compare brush height to a wear line if your model has one. Flattened or short brushes should be replaced so they can lift dirt again.

4. 4

   Filter clear

   Match the filter to the debris.

   Fit a fine filter for silt, sand, and pollen, and a coarser one for leaves and larger material. Some pools need a mid-season switch as the debris type changes.

5. 5

   Tracks checked

   Check tracks or tires for grip.

   Look for worn, cracked, or slick drive surfaces. Poor grip means the cleaner drifts over debris rather than working it toward the intake.

6. 6

   Flow restored

   Confirm coverage.

   Watch a full cycle. If whole zones are skipped, a path or steering issue may be leaving debris untouched rather than a suction problem.

Water and setup factors

• Debris beyond the design. Very fine dust or heavy storm debris can exceed what the filter is built to capture in one pass.
• Running too seldom. Long gaps let debris settle and bond to surfaces, which a single cycle cannot fully lift.
• Cycle too short. A cleaner pulled out early may not reach the whole pool, leaving debris that looks like a pickup failure.