'''Remove Shipping Materials'''
If your washer is new and the problem started immediately, it is likely caused by shipping materials accidentally left in place. On a top-loading washer, a shipping bolt is installed on the bottom center of the washer. Top-loading washers also typically have three shipping bolts, spacers and metal clamps in the back of the washer. Some models may have even more shipping materials that need to be removed. Refer to the installation instructions for your washer and make sure all shipping materials have been removed before using the machine. Failure to remove these shipping materials causes problems with the spin cycle, and it can also damage the machine permanently.
'''Level the Machine'''
Check that the machine is level across the front, back and sides. A machine that is not level will rock during the spin cycle and cause the machine to be off balance. All four legs should be in firm contact with a solid floor. A carpeted surface can throw this balance off. If your washer is located on a pedestal, the problem can be amplified. Top-loading washers automatically adjust to level. If something has shifted, you can relevel a top-loading washer by tipping the washer forward, then placing it back on the floor. Front-loading washers level by turning a leg to raise or lower it. You may need to open the front access panel to loosen the lock nuts that control the legs.
'''Check for Overloading'''
If you tend to fill the washer completely to the top, regardless of the weight or composition of the contents, you may be overloading your machine. An easy way to check this is to run a small load. If you have no problems with a small load, consider that overloading may be causing your spin cycle balance problem.
'''Look for Laundry Caught Below the Tub'''
Laundry caught below the tub or between the agitator and the inner tub can cause the washer to operate off balance with every load. The problem can be anything: a penny that worked its way out of a pocket, a button that fell off a shirt or a wayward sock or other article of clothing. If you cannot see a problem, you may need to remove the front or top panel and the agitator. Remove the offending item and clean out any debris. Replace the agitator and panel before running the machine again.