Maytag Centennial Commercial model # MVWC6ESWW1, about 2.3 years old. This machine automatically detects weight of clothes and adjusts water level accordingly. Not very good at that but that is a different story. Washer filled with water, load was jeans. After tub was filled, the machine just started humming. Didn't do anything else. I thought maybe the load was too heavy so removed some of the jeans, and turned it on again. It adjusted the water level to the top, and then started humming as soon as the water flow stopped. It *sounds* like the hum is coming from the top of the machine, but couldn't swear to it. I checked all the other wash settings (Regular load, heavy load etcetera, and it only hums for every choice.) Can anyone suggest how to fix this?