Irobot Roomba j Series Robot Vacuum Charging Error 21 Error Code

← Back to Error Search

What it means

The robot docked but was unable to maintain charging.

Try this first

Clean the charging contacts on the robot.
Clean the dock contacts.
Place the robot securely on the dock.

Can I keep using it?🔴 Charging-system fault

Repair usually required?⚠ Battery, dock, or robot service may be required

If the error keeps returning

If Charging Error 21 remains after the recommended checks, use the iRobot app or contact iRobot support.

Official source

Troubleshooting information verified against manufacturer support documentation.

View manufacturer support page →

Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.

← Look up another error code

iRobot Roomba j Series Robot Vacuum Charging Error 21: Quick Answer

What it means: The robot docked but was unable to maintain charging.

First thing to check

Clean the charging contacts on the robot.

Can I keep using it?

Charging-system fault

Repair outlook

Battery, dock, or robot service may be required

If the code remains

If Charging Error 21 remains after the recommended checks, use the iRobot app or contact iRobot support.

Model note: Error-code meanings and procedures can vary by model and model year. Confirm the code against the documentation for your exact appliance before replacing parts.

Manufacturer reference: homesupport.irobot.com