The F20 code was low/no water pressure code. I watched a YouTube video and purchased a Water Inlet Valve from Appliance Pros. After my son installed the new part my washer still didn't work. I looked on Google for trouble shooting and the 1st thing it said was turn on both hot/cold water as the washer needs the pressure of the hot/cold water. I had turned off the hot valve because it was leaking. I assumed I could still do cold water loads.