Bosch Imbalanced Motor Fan or Debris in Cyclone

Handheld unit vibrates excessively, especially at higher power

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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

Debris stuck on motor fan blades, Cyclone assembly not seated correctly, Broken or warped fan, Dust build-up causing imbalance

How to Fix / Troubleshooting

Safety first: Remove the battery before inspecting internal components.

  • Clean cyclone: Remove the dust bin and cyclone assembly. Wash and dry thoroughly if allowed by the manual.
  • Inspect motor inlet: Look into the motor inlet for clumps of dust or debris stuck to the fan. Do not insert metal tools; use a soft brush or compressed air carefully.
  • Check assembly fit: Ensure the cyclone and bin are reinstalled correctly and fully seated. Misalignment can cause vibration.
  • Test without accessories: Run the handheld unit alone. If vibration persists, the motor fan may be damaged.
  • Replace motor unit: A warped or cracked fan requires replacement of the motor assembly.
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Repair Difficulty

Medium 3/5

Required Part

Cyclone Assembly or Motor Assembly
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