Robot vacuum says “Error 9: Tap Roomba’s bumper to clean” and stops shortly after starting.

Safety first: Power off the robot before manipulating the bumper.

Steps to resolve:

• Free the bumper: Firmly tap along the front bumper with your hand to loosen any stuck debris. Ensure it moves in and out smoothly across its full width.
• Inspect for obstructions: Look between the bumper and body for lodged objects (toys, cords, etc.) and remove them.
• Clean bumper gap: Use compressed air or a thin, soft brush to clean the gap between the bumper and the robot’s body, especially near the corners.
• Check bumper travel: Press and release the bumper multiple times; it should return fully without sticking.
• Reset and test: Perform a soft reset, then start a cleaning cycle in an open area.

When to replace parts: If Error 9 continues and the bumper feels loose or does not spring back, the bumper sensor assembly or springs may be damaged and require replacement.