Error 3003
Neato
Main brush encoder or stall fault
Neato app reports 'Error 3003: Brush error' and cleaning stops.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Brush encoder sensor dirty, Brush motor intermittent, Gearbox wear, Wiring harness loose
How to Fix / Troubleshooting
Safety: Power OFF the robot and remove the main brush.
- Clean brush and housing: Remove all debris from the brush, end caps, and brush cavity.
- Check motor shaft: Start a cleaning cycle briefly with the brush removed to see if the motor shaft spins smoothly. Stop immediately after checking.
- Inspect wiring: If accessible, check the brush motor connector on the main board for a secure fit.
- Replace motor assembly: If the shaft does not spin or stalls under light load, replace the main brush motor assembly.
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Repair Difficulty
Hard
4/5
Required Part
Main Brush Motor Assembly
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