Unit vibrates excessively or feels unstable during operation.

Safety first: Unplug the machine before inspection.

• Clean brush roller: Remove the brush roller and clear any unevenly distributed debris (hair, threads) that can cause imbalance.
• Check bearings: Inspect brush end bearings for play. Replace the brush roller if bearings are worn.
• Inspect wheels: Check that wheels and axles are secure and not wobbling. Tighten or replace as needed.
• Tighten mounts: Verify that the motor mounts and internal brackets are tight to reduce vibration.