It appears this is a major glitch in the tj jeeps from the other posts I've read. My issue started with it running louder on the fourth and third setting on the AC. It did this for a few weeks, then the fan stopped all together on all settings. It came on for a day then died again. Last night I tried the defroster and that did not work (they are diffent fans aren't they?). Where would you start on this, the control pannel?