To preface this - I've already recharged my AC at a shop. No leaks in the system it held pressure for solid 20-30 minutes but the refriegerant was very low. They recharged it to full and my AC was perfect. This was about two months ago.

Today, i run my AC and i can feel my driver side vents are warmer than my passenger side. This was the same symptom that prompted me to take the car to the AC shop two months prior but there isn't a leak in my system (as far as i know...) I did some googling and came across multiple threads from years past saying to recharge the AC (already did that), do the button presses to 'amplify' the AC (I have an early 04' model so that doesn't work for me), or see if there is a leak (shop confirmed there isn't a leak in the system.)

Could this be a matter of the blend door failing? Is that something that happens on these cars? Any thoughts on this?