Vacuum will not start, red error indicator flashes once repeatedly when power button is pressed

Safety first: Switch the vacuum OFF, remove any detachable battery pack, and unplug the charger from the wall before inspecting. Do not attempt to open the battery pack casing.

• Step 1 – Verify outlet and charger: Plug another device (like a lamp) into the same outlet to confirm power. Then plug the AEG charger or charging stand into a known-good outlet.
• Step 2 – Inspect charging contacts: On the AEG cordless vacuum (handle or battery pack) and on the charging dock, inspect the metal contacts. Clean gently with a dry cloth. If there is light corrosion, use a cotton swab slightly dampened with isopropyl alcohol and let it dry fully.
• Step 3 – Charge for an extended period: Place the vacuum correctly on the AEG charging stand or connect the charger directly (depending on model). Ensure the charge LED shows charging (usually pulsing). Leave it on charge for at least 4–6 hours even if the LEDs do not immediately respond.
• Step 4 – Test operation: After extended charging, remove from the dock and press the power button. If E1 or single red flash persists and the unit will not start, the battery pack may be below recovery threshold or the protection PCB has failed.
• Step 5 – Try a known-good battery (if removable): If your AEG model uses a removable battery, test with another compatible AEG battery pack. If the vacuum runs normally, replace the original battery pack.
• Step 6 – If still no start: The internal battery protection board or main control PCB may be faulty. Do not bypass protection circuits. Contact an AEG service center for battery pack replacement or main board diagnosis.