Sorry if this has been ask before, but I have a PB 850 G Navigator that was given to me by a client for Christmas. It was dropped off at my house all put together and ready to go. I already have 2 Traegers , one at home and one to camp so I'm used to pellet grills. I did the burn off and seasoned everything with vegetable oil. The next day we put a ham on smoke for 2 hours and then raised the temperature to 225 for about 2 more hours. After about 4 hours total I put the meat probe in only to find out that the ham was only 80 degrees. I went and got a thermometer that is use to fry fish and it said my temp was 180 and the PB said 225. I then went and got an oven thermometer to compare and it said 185. Ran the temp up to compensate and try to save my ham but it didn't work. PB sent me new controller and stat that I put in yesterday. Put in new stat and now it is worse.Most of the time it is 20 percent low, but sometimes it will catch up, so you can't compensate. PB said they will send me a new one again, but I don't think it will fix it. I would get my money back had I purchased it. Client keeps asking how I like it so I have to keep it. Had it a month and it hasn't cooked anything yet.