Bomann Mechanical Noise / Bearing Wear

Vacuum makes loud rattling or grinding noise during operation

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Worn main motor bearings, Debris inside motor fan, Damaged brush roll bearings, Loose screws in motor housing or floor nozzle

How to Fix / Troubleshooting

Safety first: Turn OFF the vacuum, remove the battery pack, and do not run the unit if you suspect internal damage.

  • Step 1 – Isolate noise source: Run the vacuum briefly (battery installed) and listen to determine if the noise comes from the main body or floor nozzle. Then power off and remove the battery.
  • Step 2 – Check floor nozzle: Remove the motorized head and spin the brush roll by hand. If you feel roughness or hear grinding, replace the brush roll assembly.
  • Step 3 – Inspect for loose parts: Check all external screws on the nozzle and main body. Tighten gently if any are loose.
  • Step 4 – Main motor noise: If the noise clearly comes from the main body and persists without the nozzle, the motor bearings or fan are likely damaged.

Do not continue using a vacuum with loud grinding noises from the motor. Arrange for professional replacement of the main motor assembly.

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Repair Difficulty

Hard 4/5

Required Part

Brush Roll Assembly
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