So this has been bugging me for a while. There is this high frequency sound coming from the blower motor once you turn past 2 on the speed. At full blast it's harder to hear because of all the air noise coming from the vents but on 3,4 and 5, it's very noticeable. I just don't want to deal with taking it in. Anyone else have this? Only one person I have had listen could hear it (a young lube tech) but these old guys can't hear anything (much less a high frequency noise).