It is probably the pump that removes water from it. or the connection on either side of it. Turn off the water to the dishwasher and unscrew it from the cabinets and pull it out and turn it upside down and take a look at it. There isn't much to them and I'm sure you can fix it yourself if you can get ahold of a pump. that's my two cents but I haven't done that in at least 10 years.