Vacuum makes a loud high-pitched whistling noise during operation.

Safety first: Remove the battery before inspecting for leaks.

• Step 1 – Check bin and covers: Ensure the dust bin and all filter covers are fully latched.
• Step 2 – Inspect gaskets: Look for flattened, torn, or missing rubber seals around the bin and filters. Clean them and reseat carefully.
• Step 3 – Locate leak: With the vacuum running (use caution), move your hand around joints and seams to feel for escaping air. Do not block vents completely.

If a crack or permanently deformed seal is found, replace the affected plastic housing or gasket set.