I've seen that MES temp issues are quite common, and I've read a lot of the threads on this forum about them. I have the 30"MES with the window. I set the temp to 275 (its max), but it never reaches that high. According to the smoker, it gets up around 240-250, and according to my Maverick and other probes, it never really gets above 220. It's in the 80s outside so that shouldn't be an issue. I called Masterbuilt and they sent me a new control for it. I installed it and it didn't make a difference. I have an AMNPS, so I have the chip loader open 1-2" and the exhaust all the way open. I was beginning to think that might be some of the issue. So I did a test in my closed garage with no vents or anything on the smoker, and it was getting higher temps. So is the MES just not capable of producing high temps with air moving through it? Thanks for any advice.