Vacuum displays E12 and emits a continuous beep when the dust bin is attached; unit will not start.

Safety first: Remove the battery before adjusting the dust bin or opening the housing.

• Step 1 – Remove and reinstall the bin: Detach the dust container completely and inspect the rim and latch for cracks or deformed plastic. Reattach firmly until you hear a click.
• Step 2 – Clean sensor area: Look for a small switch or magnet area near the bin mounting point. Wipe away dust that may prevent proper contact or detection.
• Step 3 – Check latch operation: Ensure the latch moves freely and fully engages. If the latch is broken, replace the dust bin assembly.
• Step 4 – Inspect sensor (advanced): Open the housing near the bin mount and locate the bin presence switch or reed sensor. Check wiring and solder joints. Test the switch with a multimeter while manually actuating it.
• Step 5 – Replace faulty components: Replace the bin presence switch, reed sensor, or entire front housing module if damaged. Use genuine Princess parts to ensure correct alignment.