Hi Guys, My first post. I have a 2008 Non EL EB with automatic climate control with an annoying issue. Once the system reaches the selected temp the climate control system produces a significant airflow whistle (sort of like a window opened just a crack). Once i the temp falls or rises, the whistle goes away. I am thinking it is a failing blend door actuator, however, before I tear into it I was hoping the experts here could confirm. Thanks ahead of time for the help!