thanks it did it the last time tried to use it also! It was so embarrassing after having my in laws over and bragging on how good the wings would turn out just to have them not done! I submitted a case also.
was it sitting in direct sunlight? I used mine before in direct sunlight with the grill set to 400 as I was grilling steaks and it was 95 degrees outside and that was with the original Pit Boss Pro Series controller.
I have also smoked a pork but for 10 hours in 96 degress direct sunlight as well with no issues,
I personally believe you have a bad RTD Thermometer or bad controller.