Dishwasher vibrates excessively or moves during operation.

Safety first: Turn off and unplug the dishwasher before adjusting installation.

Step-by-step checks:

• Level the appliance: Use a spirit level on the top edge of the dishwasher. Adjust the front and rear feet until the unit is stable and level.
• Secure to cabinet: Ensure the dishwasher is fixed to the countertop or side cabinets using the supplied brackets and screws.
• Load arrangement: Avoid placing very large pans that can be struck by spray arms. Check that arms rotate freely.
• Check for pump debris: If vibration is accompanied by noise, inspect the circulation and drain pumps for foreign objects.

Proper leveling and securing usually eliminate excessive vibration.