My MES 30 is full of meat and it will NOT stay running. It's very random sometimes 15 min sometimes 35-40 sometimes just a few min. I has been working fine and hasn't moved. the whole thing shuts off. Some times when I restart it the screen fills with 8's and cycles down 7..6..5...etc. has anyone experienced anything like this?? I really don't want to sit in the garage restarting the smoker all night.