Vacuum makes a high-pitched whistling noise during use

Safety first: Turn OFF and unplug the charger before inspection.

• Step 1 – Localise the sound: Run the vacuum briefly and listen around the bin, filter cover, and joints to identify where the whistle is loudest. Then switch OFF.
• Step 2 – Check bin fit: Remove and refit the dust container, ensuring it locks firmly into place.
• Step 3 – Inspect seals: Examine rubber gaskets around the bin, cyclone, and filter cover. If flattened, torn, or missing, replace the affected part.
• Step 4 – Look for cracks: Check the bin and cyclone for hairline cracks. Replace cracked components with genuine AEG parts.
• Step 5 – Test again: After replacing or reseating parts, run the vacuum to confirm the whistling has stopped.