KitchenAid wont self clean

Hi I tired to start the self clean feature the other night and it came up with the time settings and when I pressed the start button it locked the door and the the control panel went blank and the error code F5 08 "I believe" came up. I tired a few times, some times the door was locked and once it wasnt. I would like to fix this if I can. Everything else with the oven works fine.