Robot vacuum displays E15 and cannot find or dock to the charging base.

Safety first: No internal work is required for basic checks.

• Relocate dock: Place the Hoover charging base against a wall with at least 0.5 m clearance on each side and 1.5 m in front. Avoid direct sunlight and mirrors.
• Clean IR windows: Wipe the small dark plastic windows on the front of the dock and the front of the robot with a soft cloth.
• Remove obstacles: Clear objects near the dock that may block the robot's path or IR signal.
• Test manual docking: Place the robot about 1 m in front of the dock and press the Home/Dock button. Observe if it approaches and aligns.
• If E15 persists: The dock's IR transmitter or the robot's IR receiver board may be defective. Try a replacement charging base. If that fails, the robot's front IR receiver PCB may need service.