Loud grinding or rattling noise from the bowl area during mixing or chopping.

Safety first: Unplug the Thermomix and wait for the blades to stop completely before removing the bowl.

• Check for foreign objects: Remove the bowl and inspect for spoons, bones, pits, or other hard items that may have contacted the blades. Remove any debris.
• Manual blade check: With the blade set removed from the bowl, carefully rotate the shaft by hand. It should turn smoothly without grinding or excessive play.
• Inspect blades: Look for bent, chipped, or deformed blades. If any damage is visible, replace the entire blade set.
• Test with empty bowl: Reinstall a known-good blade set and run briefly at low speed with an empty bowl. Persistent grinding noise indicates possible motor coupling or bearing issues, requiring professional service.