Robot mower shows E10 and stops; often associated with wheel speed anomalies.

Safety first: Turn OFF the mower and secure it before removing wheels. Avoid contact with blades.

Steps to check:

• Remove wheel: On many Worx models, the drive wheel can be removed by taking out the central screw. Pull the wheel off to expose the encoder area.
• Clean encoder: Look for a slotted or magnet ring encoder on the motor shaft. Gently clean away grass and dirt with a soft brush.
• Inspect sensor: Check the small sensor board near the encoder for damage and ensure its connector to the main harness is secure.
• Reassemble and test: Refit the wheel, tighten the screw, and run a short test. Observe if E10 reappears on the same side.

When to call a technician: If cleaning and reseating do not resolve the issue, the wheel motor assembly or main board may need replacement.