The UE error code is nothing to worry about. It indicates an "unbalanced error"¬-your washer's way of saying that the drum is not spinning is a smooth rotation. It could be as simple as rearranging the load in the drum (click image for zoom). Here's why:
1) Small loads. Your washer operates better when the weight of the load is evenly distributed across the drum, but that is not always possible with small loads.
2) Mixed fabric loads. For example, if you're washing jeans and t-shirts, the jeans could be on one side and the t-shirts on the other, causing the unbalance. Try rearranging the items and spin again.
3) Large single items. Items like sheets, blankets and comforters tend not to spread out evenly, causing unbalance when the drum spins. Rearrange the item and start the spin cycle over.
4) Spin Sense Option. If your washer has the Spin Sense Option, it may try to adjust the load on its own. If that happens, the washer would slow down and tumble a few times slowly during the spin cycle and then speed up until the problem is resolved.
Hope this helps.