You guys probably already know this, but I'm going to post it anyway because at the time I never knew I had these dials lol.
This was back last year during the first summer I had the car, I noticed there was no cold air coming out of the central vent and I couldn't figure out why. I spent a couple of days being extra sweaty and then realized those dials were switched to the heat position, I dialed them back to cold and voila! I had cold AC again.
Just wanted to share just in case anyone overlooked it like I did lol