I start it up on any cycle. the basket fills. after it fills it hums for a few seconds then the gfci outlet trips and the washer stops huming (of course...l.no power) I stop the washer (setting control) and re-set the gfci. when I start the washer it just hums...... I was told it was the water pump....I have already ordered one. could it be perhaps a plug not connected? or a circuit board? the motor? What seems the most likely??? the machine is about 5 or 6 years old and was totally dependable until this problem..