I've found pennies or dimes in the drain hose that passed by the coin catcher. If its flat against the pump, it stops the water from pumping out. If the change is standing straight, the water drains fine past the coin. The coins will change position which some times allows it to drain and other times not. If thats not it, you may/probably/most likely need a new pump. Once removed, If it, (the pump) moves freely, wobbles or is noise when in use it is worn out. @ $80 off ebay, $140 through sears parts direct. Good Luck and I hope this helps.
Jim Farrell, Your Handy Dandy Home Man