Hi this is Bryan , there are a couple of reasons this can happen, even though your getting plenty of water through your water dispsenser does'nt mean your valve doesnt have a problem. it is a dual electronic valve one side could work fine the other may be sticking and not opening all the time . the other problem could be ice maker itself or the tube that runs into ice maker through back of freezer could have some ice in it. check valve first. it realy needs to be replaced if its not working correctly you cant take appart to clean.more than likely valve is your problem. hope this helps. Bryan ps have to go to work for awhile today be back later if you need more help.