Vacuum makes a rhythmic knocking or thumping noise from the floor head while rolling.

Safety first: Remove the battery and detach the floor head.

• Step 1 – Inspect brushroll: Remove the brushroll and check for wrapped debris or damage. Clean thoroughly.
• Step 2 – Check housing: Look inside the head for stones, screws, or hard objects that could hit the roller.
• Step 3 – Spin test: Spin the brushroll on a flat surface. If it wobbles, it is bent and should be replaced.

Persistent knocking after cleaning usually indicates a deformed brushroll or worn bearings; replace the brushroll assembly.