1. Check for the leveling to see if the washer is not leveled. One way to check the leveling is to press the washer down on diagonally opposite corners and check for any movement. 2. If the washer rocks, level the washer with the wrench provided by adjusting the leveling feet located on the bottom of your washer until there is no movement detected. 3. Bulky items such as blankets, comforters or carpets can also cause a vibrating noise when they get tangled on one side of the drum and cause it to become unbalanced. 4. If this happens, pause the washer, open the door and redistribute the load evenly before resuming the spin cycle.