I just replaced by old dishwasher with a new one. Worked fine for the first 3 loads, now when water enters the unit I get some serious vibrations (I am assuming from the copper line). When I open the parallel hot water faucet to the bathroom next door the vibration stops. Never had this problem with the old unit. I did have to use all of the copper line in order to make the connection to the washer, previously the line had a curvature from the sink area before it ran into the dishwasher cabinet area. Any ideas for solutions???