I'm no repairman but one possibility is that you have something stuck in the drain hose.Go under the sink and look at your drainpipe and there should be a probably small grey hose running into an adapter. unplug the hose and check for "crud". if none found unscrew the adapter counterclockwise and look for crud. remove any obstructions , reconnect adapter and hose tightly and put washing machin into drain cycle. hope this helps. good luck...
david
May 2008