This has been happening for a while. Two things: one, the mechanism that selects the different vents creaks very loudly, stutters, etc. all indicating inadequate lubrication. I've already contorted myself once before to spray lubricant up on the offending part, but the noise is back again. This gets very annoying BECAUSE of my second problem. The vent selector switch has a mind of it's own. At random, no matter what selection the switch is on, the mechanism will alternate between different vent settings. Probably... every 30 to 90 seconds or so. I hate it! It's as if someone installed a remote vent selector in my Xterra and is moving it around at my expense. I have verified that the connector in back of the vent controls is clean, and plugged in securely. If it's a short, it doesn't appear to be there. I just don't know if the problem lies in the switch itself, or in the selector unit. Anyone else with similar problems???