Among many issues with this grill, my controller does not work correctly. If I set to 225 it will maintain 190 and if I set to 250 it will maintain 200. It never really attempts to reach the set temp nor does it ever get there. This is of course after pre heating the gril to 350+ and cooking in all weather conditions (wind/no wind/hot/cold). I've read that this is common problem for which pit boss will replace the controller with a newer one with newer firmware. How can I go about requesting and receiving a newer replacement controller?