Robot vacuum displays E12 or announces a sensor error related to the wall or obstacle sensors; navigation is erratic and it may not detect walls properly.

Safety first: Turn OFF the robot and remove it from the dock.

• 1. Clean front sensors: Use a soft, dry microfiber cloth to wipe the dark plastic windows on the front and sides of the robot where the IR obstacle sensors are located.
• 2. Inspect for cracks: Check the sensor windows for cracks or heavy scratches that could distort the IR beam.
• 3. Reset robot: Power the robot back ON and test navigation in a simple environment with clear walls and few obstacles.
• 4. Internal inspection (advanced): Remove the top cover and locate the front IR sensor board. Ensure it is firmly mounted and that the wiring harness is fully seated in the main PCB.
• 5. Replace sensor board: If E12 persists and the sensors are clean and connected, replace the iHome front obstacle sensor board.