I have had this smoker for three months and used it with no problems at least six times. Trying to smoke some beef jerky and need temp to stay below 180. Fired up the smoker as per instructions but it will not stop at 180, the temp goes to 230-240 range and stays there. I turned it up to see if it will go higher and it will but it will not go below the 230 degree mark. Seems like a bad controller.