iRobot · Robot Vacuum Moderate
Error 1 — Side wheel stuck / off ground
Roomba detects that one or both side (drive) wheels are hanging down or stuck and not making proper contact with the floor.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Verified against
- homesupport.irobot.com ↗
How to fix it
- Pick the robot up and place it on a flat, open floor away from edges and clutter.
- Push each side wheel up into the body and let it drop — it should spring back smoothly.
- Flip the robot over and inspect both wheels for hair, string, or debris wrapped around the axle.
- Use scissors or a seam ripper to cut away tangled hair, then pull it out with tweezers.
- Spin each wheel by hand — it should rotate freely with even resistance.
- Press CLEAN to restart. If Error 1 returns immediately on a flat floor, the wheel module needs replacement.
- Replace the wheel module (sold as left/right assemblies for most series).
Why it happens
Typical signs: Robot stops and announces 'Error 1' · Robot may rock back and forth before stopping · Wheel spins freely with no resistance · Robot stranded on edge of rug or step
- Robot hung up on edge or obstacle Wheel dropped into a gap, off a ledge, or tangled in cords/fringe so it can't get traction.
- Debris wrapped around wheel axle Hair, string, or carpet fibers wound around the wheel assembly preventing normal movement.
- Wheel module stuck in dropped position The spring-loaded wheel module is jammed and won't retract back into the body.
- Failed wheel module Internal gearbox, motor, or encoder in the wheel module has failed.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More iRobot robot vacuum codes
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Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: homesupport.irobot.com.