Why is my washing machine making vibrating or thumping noises during operation?

Vibrating noise may be caused by the transit bolts not being removed during installation, or by all four feet not resting firmly on the ground. A thumping sound during heavy wash loads is usually normal, but if it continues, the washer may be out of balance — stop and redistribute the wash load. If rattling or clanking continues after restarting, contact your authorized service centre. (Page 24)