Robot vacuum displays F15 and may not detect walls or obstacles correctly, bumping repeatedly.

Safety first: Turn the robot OFF before cleaning sensor windows.

Steps:

• 1. Clean front sensors: Wipe the front-facing sensor windows with a soft, dry cloth to remove dust and smudges.
• 2. Avoid mirrors and glass: Test the robot in an area without large mirrors or floor-to-ceiling glass, which can confuse IR sensors.
• 3. Reset and test: Power the robot back on and start a cleaning cycle, observing how it approaches walls and furniture.

When to call a technician: Persistent F15 indicates a likely failure of the front IR sensor board or its connection. Professional replacement of the sensor module is recommended.