ERROR CODE EXPLAINED
Irobot Roomba s Series Robot Vacuum
Irobot Roomba s Series Robot Vacuum Charging Error 120 Error Code
What it means
Charging Error 120 means the battery has a fault or is not ready to charge.
Try this first
- Remove the battery for 15 minutes, then reinstall it.
- If the error persists, the battery may need to be replaced.
Can I keep using it?Correct the charging condition before relying on the robot for normal charging.
Repair usually required?Battery replacement or manufacturer support may be required if the iRobot procedure does not clear the charging error.
If the error keeps returning
Use the linked official iRobot charging error chart for the manufacturer guidance.
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.