Roomba side brush not spinning: clean it safely

A Roomba can move while its edge-sweeping brush is slowed or stopped, so first observe the brush during a normal CLEAN run on a clear, suitable floor. If it does not rotate, iRobot’s official sequence starts with brush care rather than immediate module replacement: power down the robot, remove the brush using the method for its series, clear debris from both the brush and module post, reinstall it and test again. Brush fasteners and modules differ across Roomba generations. The 500–900 series share one published care method, while e, i and j series and newer robots must follow their own design. Some newer i1, i3 and i5 variants are non-modular, which is why a replacement module should never be selected from appearance alone.

Models covered

Safety first

Never touch or remove the side brush while the robot is running. Power it down and keep it off the dock during care.
Use the fastener method for the exact series, support the robot on a flat surface and do not force a screw, pull-off brush or bottom cover.

What the symptom may indicate

The brush is intermittent or turns slowlyHair, thread and compacted dust can add resistance around the brush hub or post. Cleaning is the first official action.

The brush never moves during CLEANConfirm the brush is correctly installed and test again after cleaning. If it remains still, iRobot says the edge-sweeping brush module may require replacement or service.

Roomba stops and reports Error 6On the 500–900 and e series covered by iRobot’s Error 6 article, a stopped side brush is one documented check when the robot stops away from a dark surface or an edge.

Checks in the right order

Observe one controlled CLEAN run
Move the charged robot to a clear, suitable floor, start CLEAN and watch whether the edge-sweeping brush rotates. Stop the robot after the observation; do not reach under it while it is moving.
Power down and identify the series
Remove the robot from its dock, switch it off as its guide directs and note the complete model or series. Place it upside down on a flat, protected surface only after it has stopped.
Remove the edge-sweeping brush correctly
Use the exact-model care procedure. For Roomba 500–900 models, iRobot specifies loosening the side-brush screw with a coin screwdriver or small screwdriver; other generations can use a different fastener or pull-off design.
Clear the brush and module post
Remove hair, thread and debris from the brush hub, arms and the exposed post of the edge-sweeping brush module. Inspect the fastener and brush for visible damage without opening the robot body.
Reinstall and test once
Seat the correct brush, secure it without forcing the fastener and return the robot upright. Run one more controlled CLEAN test. If the brush still does not spin, record the model, serial number and result for iRobot support.

Stop and get qualified help when

Stop if the screw is missing, stripped or seized, if the brush mount is cracked, or if debris cannot be removed without opening a module.
If the brush remains still after official care or the error persists, contact iRobot before ordering a module; model and serial details determine whether the module is replaceable.

Sources used

iRobot — For covered Roomba 500–900 and e series robots, iRobot says to observe whether the side brush spins, remove it and clear debris, then contact support if the problem remains.
iRobot — iRobot documents the shared 500–900 series care sequence: loosen the correct fastener, remove the brush, clear brush and post, then reinstall.
iRobot — The all-model care article covers 500–900, e, i and j series, places cleaning before module replacement and warns that some newer i-series variants are non-modular.

Last checked: 29 August 2026