Vacuum shows E12 and suction is reduced; the unit may pulse on and off.

Safety first: Remove the battery before opening the dust bin or filter compartments.

• Step 1 – Verify filter installation: Remove and reinstall the pre-motor and HEPA filters, ensuring they are oriented correctly and fully seated. Listen for any locking clicks.
• Step 2 – Clean filters: Tap filters gently to remove dust. If washable per Cecotec manual, rinse with water and allow to dry completely (24 hours) before reinstalling.
• Step 3 – Check filter doors: Ensure all filter covers and doors are fully closed. Some models have micro-switches that detect open covers.

If E12 persists with clean, correctly installed filters, the filter detection switch or sensor may be faulty, requiring service.