Robot vacuum frequently reports that the dustbin is full even after emptying, but no specific code is shown.

Safety first: Turn off the robot and remove the dustbin.

• Clean dust sensor area: Locate the small window or port inside the dustbin or bin cavity where the dust sensor is located. Gently clean with a dry cotton swab.
• Empty more frequently: In very dusty environments, empty the bin more often and clean filters regularly.
• Reset and test: Reinstall the bin, power on, and test. If the robot still reports full bin immediately, the sensor PCB may be faulty.
• Service if persistent: Have the dust sensor PCB inspected and replaced if necessary.