Robomow displays E12 and stops, sometimes accompanied by erratic movement or spinning in place.

Safety first: Turn the mower OFF and remove it from the lawn. Avoid operating on wet ground while troubleshooting.

• Check for wheel jams: Inspect both drive wheels for debris or damage that could lock the wheel. Remove any obstruction.
• Inspect drive motor area: Look under the mower for signs of oil/grease leakage, broken gearbox housing, or water ingress.
• Check motor cables: Follow the cables from each drive motor to the main board. Look for cuts, crushed sections, or corrosion at connectors.
• Dry the mower: If the mower has been exposed to heavy rain or washing, allow it to dry thoroughly indoors.
• Test on level ground: After inspection and drying, power ON, clear the error, and test in a small, flat area.
• Persistent E12: A drive motor or the motor driver circuit on the main board is likely damaged and should be replaced by a technician.