Robot vacuum displays E4 and stops, often after moving a short distance.

Safety: Power OFF the robot and place it upside down on a soft cloth.

• 1. Inspect the left wheel:
  • Rotate the left drive wheel by hand. It should turn smoothly with some resistance.
  • Remove any hair, string, or debris wrapped around the wheel axle or trapped in the wheel well.
• 2. Clean wheel cavity:
  • Use tweezers or a small brush to clear debris from the wheel housing.
  • Check that the wheel can move up and down freely (suspension action).
• 3. Reset and test:
  • Turn the robot back ON and start a cleaning cycle on a flat surface.
  • If it moves briefly then shows E4 again, the motor or encoder may be failing.
• 4. Advanced inspection:
  • Remove the bottom cover and locate the left wheel module.
  • Check the wheel motor connector to the main board for a secure fit and no corrosion.
• 5. Replacement:
  • If the wheel feels rough, clicks, or does not respond, replace the left wheel motor assembly.