I have just acquired a Whirlpool Quiet Partner II ( M# DU1148XTPB7 ) from a friend and everything works except the wash, It will run through the cycles and get water at the bottom and drain it at the end of the cycle but as soon as it hits the wash, No water will go to the sprayers and they do not turn, but you can here the motor making the humming sound as if it were going to the sprayers, and I assume that if the water is draining that the pump works, any ideas would be grateful...