Roomba side brush not spinning
DIRECT ANSWER
COMMON CAUSES · RANKED
Hair wrapped under the hub MOST COMMON
The brush spins in a steady circle, so hair and fibers wind tight and work their way under the hub until the brush jams.
Debris inside the gear case
Hair reaches the gear shafts behind the brush post. The post turns stiffly or grinds when you spin it by hand.
Bent or damaged brush UNCOMMON
A warped brush wobbles and catches on the chassis. Arms with melted or missing bristles have the same effect.
Side brush motor failure RARE
Post clean, brush new, still no spin — the module's motor is gone.
HOW TO FIX IT
Remove the brush
Undo the center screw and pull the brush off the post. Stuck? Lift gently under the hub edge with a flat tool.
Clear the wrap
Pull the hair ring off the post and out from under the hub. Scissors help with tight wraps.
Spin the bare post by hand
It should turn with light, even resistance. Grinding or stiffness means debris in the gear case — pick it out and blow compressed air into the opening.
Refit or replace the brush
Seat the brush and snug the screw — overtightening strips the post thread.
Clean post, new brush, no spin? Motor time
The side brush module has failed. On most series it is a cheap screwed-in part; search a replacement for your model.
COMPATIBLE PARTS
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Edge-sweeping side brush, 3-pack — e, i & j series
Swap the side brush when the arms look bent or stop touching the floor; a coin loosens the screw.
Check price on Amazon ↗Sources
Corrections
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