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The problem with this is a lot of the seals are no longer available and that's what's going on is the seal is eroded and the water is getting by it, there is a blower seal and that's for the water getting by, they do sell a sealant you can use on this, this is made for Maytag by Dow Corning, you can order this blue link, http://www.repairclinic.com/PartDetail/Silicone-Sealant/197265?modelNumber=WU204 you would need to pull the dishwasher out and remove the blower assembly to put the seal all the way around it and then put it back on and let it dry, that's about all the sell for this, hope this helps thanks and well wishes, Bryan
Okay this means your water inlet valve is not shutting tightly,this you can get and it's not too hard to replace, it is behind the access panel under the door, you can order this at this blue link, http://www.repairclinic.com/PartDetail/Water-Inlet-Valve/1452?modelNumber=WU204 what happens is the valve is electronic and opens with power but it is spring closed and the inside of the valve itself probably has lime build up it or hard water build up and is not allowing the valve to shut tightly therefore water will slowly drip into the machine and overfill, I wouldn't touch the blower at this point because it may be just it's getting up to hi to a point where it's coming down through the blower, change the valve first in it should take care of it, thanks and well wishes, Bryan