Motor runs but struggles, stalls, or runs at inconsistent speed even with light loads.

Safety first: Unplug the Thermomix before removing the bowl or accessing internal parts.

• Test with empty bowl: Run the motor at various speeds with an empty bowl. If it still struggles or surges, the problem is not load-related.
• Check for unusual smells: A burning smell suggests motor or driver overheating; stop use immediately.
• Cooling and ventilation: Ensure vents are clear and the unit is not overheating, which can cause temporary derating.
• Service action: Persistent weak or unstable motor operation indicates motor or control board failure. These components should be tested and replaced by a technician.