Robot lawnmower occasionally stops with the message 'Obstacle' but there is nothing visible in front.

Safety first: Turn off the mower before inspecting the bumper or sensors.

• Clean bumper area: Remove grass and dirt from behind and under the Hyundai bumper.
• Tighten bumper mounts: Ensure the bumper is firmly attached and does not rattle excessively.
• Trim tall grass: Manually cut very tall grass in areas where false obstacles occur so sensors see more clearly.
• Test bumper switches: Press the bumper and listen for a clear click from the microswitches. Replace worn switches if they chatter or stick.