I recently pushed the 'dual' button so the passenger could get warmer air, while the air conditioning was on. I set mine to 65 and theirs was set at 72. Now, the two vents on the passenger side of the car are a few degrees warmer then driver side. My mechanic said there are little 'doors' that have something to do with the air temp mixture and maybe one is jammed. I'd like to kick start everything to work again and does anyone have any ideas? Much appreciate! Michael

 

My issue is heat coming from below the dash. When driving without the air, it is very noticeable. If you find your answer, be sure to share. Hoping it is a similar problem.

 

Thanks a lot for your feedback and when/if I find the answer I will update you!