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A robot that consistently veers left or right may have resistance at one wheel or brush. Compare straight travel on a clear surface before editing its map.
Table of Contents
Start with these checks
- Remove wrapped thread from accessible wheel areas with the machine switched off.
- Check that a replaced brush and its cover are fitted squarely.
- Try a short run on level hard flooring and note which side lags.
What this looks like at home
If the problem began immediately after brush replacement, checking the fit is more informative than rebuilding every room.
Test the machine and the obstacle separately
| Check | What matters |
|---|---|
| One location only | Examine the shape, surface and escape route. |
| Every location | Check accessible wheels, bumper and brush assembly. |
| After maintenance | Recheck the fitted parts before changing the map. |
A mistake to avoid
Avoid forcing a sprung wheel beyond its normal travel.
Buy a part only after identifying the cause
Check the exact model and part reference before buying. If cleaning resolves the problem, a replacement may be unnecessary.
Browse Amazon UK results for robot vacuum compatible main brush. These are search results, not a verified recommendation for your particular machine.
What the result tells you
A consistent pull to one side on level flooring is useful evidence even without an error code. Record whether it began after fitting a part, crossing a particular obstacle or collecting a stringy item.
Related guidance
- Robot Vacuum Stuck? A Comprehensive Troubleshooting Guide
- Robot Vacuum Maintenance Tips UK: Keep Your Cleaner Running Smoothly
Sources and scope
Checked on 9 September 2026. Manufacturer instructions apply to the models they name; use your own exact manual for button sequences, removable parts and cleaning permissions. Product specifications are advertised claims. Examples illustrate decisions and are not hands-on test results.