Vacuum will not charge; charger LED blinks red or display shows E10 when docked.

Safety first: Unplug the charger from the wall before cleaning contacts or inspecting the dock.

• Clean charging contacts: Use a dry cloth or cotton swab with a small amount of isopropyl alcohol to clean the metal contacts on both the vacuum and the dock/charger. Ensure they are dry before reconnecting.
• Inspect for damage: Check for bent, recessed, or missing contact pins. Gently straighten slightly bent pins with a small tool, taking care not to break them.
• Test the charger: Plug the charger directly into the vacuum (if your model supports direct plug-in) to bypass the dock. If it charges directly, the dock is faulty and should be replaced.
• Try another outlet: Confirm the wall outlet is working by testing with another device. Avoid using power strips with surge protectors that may be faulty.
• Persistent E10: If the vacuum will not charge with a known-good charger and clean contacts, the internal charging circuit or port is likely damaged and requires professional service.