Quick answer: use the exact charging error number shown in the iRobot app or spoken by the robot. “Won’t charge” and “Charging Error 8” are not interchangeable. Start with power and contact checks, then follow the iRobot article for your model and error number.
Safe checks before replacing anything
- Confirm the Home Base or charger is connected to a working outlet.
- Seat the robot on the charging contacts and check whether the app/indicator recognizes the charger.
- With the robot powered down as the manual requires, wipe accessible charging contacts on the robot and base with a clean dry cloth. Do not use an abrasive that removes the contact finish.
- Restart the robot only with the method documented for that Roomba family.
The Roomba reports Charging Error 8
Check the record: The Roomba reports Charging Error 8
Confirm that the app or voice message actually says Charging Error 8 and note the Roomba series/model before changing the battery.
Take the next step: The Roomba reports Charging Error 8
Open iRobot’s charging-error guidance for that model. Reseat only user-removable battery components if the official instructions for the model say to do so, and inspect for obvious battery or contact damage.
Confirm the resolution: The Roomba reports Charging Error 8
The robot recognizes the charger and completes charging without returning the same error.
Escalate with evidence: The Roomba reports Charging Error 8
If Error 8 returns after the documented contact/reseat checks, stop repeating resets and contact iRobot with the model, serial number and exact error. Do not open or rebuild a lithium battery pack.
Battery safety
Stop using a battery that is swollen, leaking, physically damaged, unusually hot or wet. A battery-safety problem needs replacement/service guidance, not repeated charging attempts.
Questions people ask when a Roomba will not charge
Official sources
- iRobot Home Support — official model and error-code troubleshooting.
- iRobot Support — product manuals, parts and service routes.