Cordless vacuum shows F5; the LED ring may flash red, and the unit refuses to start.

Safety first: Disconnect the charger from the wall and remove the battery from the vacuum.

• Verify charger model: Check that the charger is the exact Rowenta model specified in your manual (voltage and current ratings on the label).
• Inspect charger and cable: Look for damage, swelling, or burn marks. Do not use a damaged charger.
• Try another outlet: Plug the charger into a different, properly grounded outlet without extension cords or power strips.
• Reset by disconnecting: Leave the battery disconnected from both the vacuum and charger for 30 minutes, then reconnect to the correct charger.
• Replace charger if needed: If F5 appears only when a specific charger is used, replace the charger with a genuine Rowenta unit.
• Service if persistent: If F5 persists with a known-good charger, the internal charge circuit or battery BMS may be damaged and require professional repair.