Just got my first pellet smoker, the 440D2. I did 2 cooks on it so far, when I set my temp say at 450, the left side will be around that and the whole right side will be at 300. The gauge on the lid and my own thermometer confirm it's at 300 give or take some degrees. When I my thermometer on the left side it'll read close to 450. Is my probe bad or a bad connection? Also it sounds like my fan is hitting the metal casing when it kicks on but it only last for about 5-10 seconds. Is the fan supposed to be continually running? Any help would be appreciated.