Did you do the firmware update before burning in? Out of the box you need to update firmware on the controller first. Weber support is still open now as well 7 days a week until 8p central time so you can call them too really helpful.I went to do my initial burn on my new smoker fire at 600 degrees. Temps got to 550, and than dropped to 450/ 460 degrees and stayed there. Any help on why, and how to fix this issue would be amazing!