Why does my chopper make a loud rattling noise?

A rattling sound usually means the bowl, blade or motor unit is not seated correctly, or a hard ingredient is moving around inside the bowl. Stop using the appliance if the noise is sudden, metallic or accompanied by vibration, as that can indicate a loose or damaged part.

1. Unplug the chopper and remove the bowl contents. Check for stones, bones, pits or other hard items that should not be processed.
2. Reassemble the bowl and lid carefully. Expected result: the parts should fit securely and the sound should reduce when the appliance runs empty for a brief test.
3. Load a small batch of suitably prepared food and run it briefly. If the rattling only happens with large or hard pieces, reduce the batch size and cut the food smaller.
4. Check that the appliance stands on a flat, stable surface and that the non-slip feet are clean.
5. If the rattling continues without load, or the blade appears loose or damaged, stop using the chopper and contact the retailer or store where the product was purchased.

The supplied manuals refer to non-slip feet or mats, short running periods and sharp blades that should not be forced. Unusual rattling is therefore a reason to pause and check the assembly before continuing.