I have had this printer for a couple months now. I recently decided to run some test prints to dial in some setting and noticed a very poor quality on some of the prints. As I watched on print I realized that the cooling fans were not turning on during the print as they had in the past. I checked the settings for fan start up played around so that it should turn on after the second layer has been laid, but still have not been able to get the fan to turn on unless I do it manually from the "Tune" menu on the ultimaker LED screen. Is there a setting I am missing that would cause the fans to never turn on during a print?