Is the vent electrically operated? With the door down I did see light inside when I shined a flashlight from the outside. About two cups of water pours out about 3 seconds after the cycle starts. The bottom spray arm assembly is not cracked and turns freely, although a little wobbly. The nylon bearings don't look worn, but there is about 1/8" of vertical movement of the spray arm assembly on the shaft. Thanks for your help!