It seems this issue comes up from time-to-time, and it's very common among TJ owners. This happens even on my TJ from time to time. I'll get in the car, start it up, then go to turn the air to blow on my face (instead of my feet) or some other position, and air won't come out anywhere but my feet or the defrost setting. There's a few reasons this can happen. Your blend door is stuck If that is the case, see this post here: https://wranglertjforum.com/threads/air-wont-come-out-of-vents.2034/#post-23747 You have a vacuum leak If that is the case, see this post here: https://wranglertjforum.com/threads/air-wont-come-out-of-vents.2034/#post-103618 Those are the two most common causes for this issue. If anyone has any input, tips, or suggestions on this subject, please feel free to share them. Just thought we needed a thread about this since it is fairly common on TJs.