I have a F51 code on my washing machine. I read that it could be a garment or something that slipped over the top and is clogging the drain in the bottom. I took the inner drum out of the machine and there was nothing in there. I think it might be the RPS sensor so I was starting to put it back together because that would be over my head when I realized that there is water trapped in the bottom of the inner tub. The outside of the tub is metal with a pattern of holes but the bottom is plastic and seems to be full of water. Any thoughts? Any help would be greatly appreciated. 