Hi,Welcome to Just Answer, My name is XXXXX XXXXX forward to helping you today.
did you take the rotor assembly apart like it shows in this video, ? http://www.youtube.com/watch?v=UXzuJvKIIgU this video also covers the F-1 code, follow the instructions in the video and you should be up and running in no time, if cleaning the rotor assembly doesn't work you will need to replace it.
video is very helpful but I've still got a problem. It appears in the video that the unit comes up easily - my doens't and I really need to yank it out pulling very hard at it. The video also reveals a "well" of water once the assembly is removed however when I remove my unit I'm left with a metal post and a stopper - so no well. I've just tried to remove the post with plyers but after giving it a good tug I'm nervous I'll do damage (not my dishwasher I'm a renter). Your thoughts? thanks