Robot Pool Cleaner Won’t Climb Walls or Move? Fixes

What is going wrong

• 1A full filterClimbing needs traction and suction together, so the first thing a loaded filter costs is the wall, not the floor.
• 2Trapped airAir left in the housing makes the machine buoyant, and a buoyant cleaner cannot press itself against a wall.
• 3The impellerLeaves and acorns jam the housing and stall the flow the machine holds itself up with.

Why climbing fails first

Wall climbing needs both drive traction and suction against the surface. Anything that reduces either, a full filter or a jammed track, shows up as a cleaner that still works the floor but slides back down the walls, before it stops moving altogether.

The usual causes

• Clogged filter or basket. A full filter cuts the flow the cleaner needs to hold a wall and to drive. This is the most common cause by far.
• Debris in the impeller or tracks. Leaves, acorns, or small stones jam the impeller or wedge in the tracks and brushes and stall the drive.
• Worn tracks or brushes. Smooth, worn tracks and flattened brushes lose grip on the wall.
• Tangled or short cable. A twisted cable pulls the unit off the wall; a cable too short for the pool stops it reaching the far side.
• Trapped air or low water. Air left inside makes the cleaner too buoyant to hold the floor; a low water level starves the intake.

Fix it in order

1. 1

   Filter clear

   Empty and rinse the filter.

   Clean the basket or cartridge after most cycles. Reduced climbing is nearly always the first sign it is full.

2. 2

   Impeller clear

   Clear the impeller and tracks.

   Power off and unplug, then remove debris from the impeller housing, tracks, and brushes.

3. 3

   Air purged

   Purge trapped air.

   Lower the cleaner in slowly and tilt it so air escapes before it sinks and starts.

4. 4

   Cable relaxed

   Untangle and check the cable.

   Straighten the cable and let it relax in the sun; confirm its length suits the pool.

5. 5

   Tracks checked

   Check water level and wear.

   Keep the water at the midpoint of the skimmer, and replace worn tracks or brushes if grip is gone.