Safety: Remove the battery and do not run the vacuum if you suspect internal mechanical damage.

1. Access motor compartment: Remove the dust bin and open the motor housing according to the Siemens service instructions.
2. Inspect fan and impeller: Look for debris (small stones, hard plastic) lodged in the fan. Carefully remove any foreign objects without bending the blades.
3. Check motor mounting: Ensure all screws and rubber mounts securing the motor are tight and intact. Tighten or replace as needed.
4. Spin motor shaft: Gently rotate the motor shaft by hand. If it feels rough, gritty, or has excessive play, the bearings are worn.
5. Replace motor assembly: If bearings are noisy or the impeller is damaged, replace the complete motor assembly. Bearing replacement alone is usually not economical on these units.

Continuing to use a vacuum with failing motor bearings can lead to complete motor failure and potential overheating.

Vacuum makes a loud grinding or rattling noise from the motor area during use.

Possible Causes