Error 36 means that the Bin Full sensor on your robot was not cleared when the robot evacuated debris into the dock. You may also see a red light ring sweeping towards the rear of the robot.
Ensure the bin full sensors on the robot cleaning head and bin have been cleaned off. To do so, remove the filter from the bin, rinse the bin and bin door with water, and let them air dry. Wipe the Bin Full sensors on the robot with a clean, dry microfiber or soft cotton cloth.
Remove the brushes and ensure the vacuum path is clear of debris.
Note: Scrub the vacuum path with a magic eraser to clean out any built up dirt or grime that has accumulated.
The Roomba j series and Combo 10 Max communicate with the dock via the charging contacts. It's possible there could be enough contact to charge, but not enough to fully communicate with the base.
If the robot doesn't evacuate debris, this could also lead to an Error 36. Please Clean the Charging Contactsto try and clear the error.
If you have an evacuating dock, follow these maintenance steps to make sure there is no clog in the dock itself. If the robot can't properly evacuate, the bin will remain full and trigger error 36.
Finally, perform a Robot Reboot by pressing and holding the button for about 20 seconds. Then try running the robot once more.
If the error continues to persist, your robot may need to be sent for repair. Please contact iRobot Customer Care.
For expedited service, please have the following ready: