This is our second one.  The first malfunctioned and couldn’t be reset so they replaced it.  Now this does a similar thing.  Shuts off after I’ve put the food on to cook.  I Stan next to until it says it is pre heated.  Put the meat on so it doesn’t get too hot but then it shuts off.  I will look for another model next time.  We also have a smaller TFal Optigrill ta a second house and have never had an issue with that one,  when it works it works well.