Hello everyone. Newbie here. I have a question about my Masterbuilt John McLemore Signature Series Propane Smoker. I just acquired this smoker over the weekend, and had the thought of smoking on it yesterday. I lit the burner, which worked fine. It had a nice small blue flame. As I turned the gas control valve/temperature gauge up, the flame size stayed the same. That is until i went over the 250 degree mark. The flame then got noticeably stronger. I left the valve in this position to see what the flame would do. Over the next couple of minutes the flame died down on it's own, until there was barely even a flame. I have tried two different tanks with the same results. The only thing i can think, is that possibly the gas control valve is bad. What do you guys/gals think the issue could be? Also if the problem is the gas control valve, where can I get one? I cant seem to find anything on the internet when I search. Thank you for your responses.