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do you have a model number so I can better assist you ?
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okay. the problem is the electronic fill valve. number 2 on this diagram. this will need to be ordered and replaced. I have included a link below to order the part.
fill valve- click this blue link. http://www.repairclinic.com/PartDetail/Water-Inlet-Valve/22002437/455168?modelNumber=MLG2000AWW I hope this helps, thanks and best wishes, Bryan