I have now owned 2 Pitt boss smokers. The first one was a fantastic unit always worked great. So I decided to upgrade to a bigger unit. The new unit that was available, is now full of flaws. Has not worked right sense I purchased it. Will not hold correct temps, to what it is set to. They sent me a new thermometer. Now it is way off. And it says it is over heating and shuts down. But the stand alone thermometer I placed on the grill never gets above 250. I have called and called about this, to get no help. Can anyone give me some ideas to get this resolved????