Vacuum makes a loud, high-pitched whistling noise during use.

Safety first: Remove the battery before inspection.

• Check bin seating: Remove and reinstall the dust bin, ensuring it clicks firmly into place.
• Inspect seals: Examine rubber gaskets around the bin, filter, and motor housing for damage. Replace any that are cracked or flattened.
• Look for small clogs: Check the nozzle and wand for small objects partially blocking airflow.
• Inspect housing: Look for cracks in the plastic body or floor head that could cause whistling. Replace damaged components.