Vacuum makes a high-pitched whistling noise during use.

Safety: Remove the battery before inspection.

• Check all joints: Ensure the dust bin, wand, and nozzle are fully seated and locked.
• Inspect seals: Look for flattened, torn, or missing rubber seals around the bin and filter housing.
• Look for cracks: Examine the dust container and wand for hairline cracks that could cause air leaks.
• Replace damaged parts: Install new seals or a replacement dust bin if any damage is found.