Hi Sam, does it seem to rock when there is a load in it?.If so then you may need a new capacitor.
Is it overfilling with water,the level is higher at the door than normal.This could be a reason and the weight is too heavy for the motor.If the level is too high.Take the lid off,at the rear right corner is a pressure switch with a black tube connected.gently pull this off and blow. When it is clear,refit and this will cure the level,Hope this helps.All the best
FOXY, September 2008