I donâ€™t know if anyone else as had this problem, but I was smoking a turkey breast this morning to warm up later for sandwiches and ran out of propane. So I changed bottles relit the smoker and noticed the bottle was making a whistling noise and the smoker wouldnâ€™t get up to even 200*. I have a level gauge that I hook between the tank and regulator, it was showing that the tank was empty (but I know it was full because of the weight). So I grabbed another bottle that I just had filled yesterday it did the same thing. I pulled the gauge out of line and temp still didnâ€™t rise like it should and the flame didnâ€™t look right. Now Iâ€™m really getting mad, the smoker worked great till I changed bottles now it wonâ€™t even hold 200*. I hook the one of the full bottles to my deep fryer and ran it for a while. The flame didnâ€™t look right at first but soon cleared up. I reattached that bottle to the smoker and everything work great. I watched the guy fill the bottles yesterday and he filled it using a scale but rather than the needle being balanced it was against the top stop. The new bottles have a shut off valve to prevent overfilling, I think that they were a little over full and that valve was restricting the flow tell the level was low enough to open the valve. Iâ€™m going to put my gauge on when I try the bottle that I didnâ€™t hook to the deep fryer, and see if the gauge will raise as the flame clears.