It will start , lid locks , but no water enters then it skips between sense

First unit MVWB755DW0 / C51840896 * complaint : it will start , lid locks , but no water enters then it skips between sense and wash then turns itself off after several minutes. ** replaced control and it operated 5-6 loads then back to the original complaint. 2nd attempt I replaced wiring harnesses , coil assembly and slide kit * worked for 2 loads then same old complaint *** 2ND UNIT * WTW7300DW / C54073584 * LG error * brand new machine with drain hose going into wash tub * plz talk it over with guys and let me know whenever you have an opportunity. Thank you as always .