Getting cold, but only one side.
I have noticed this ever since I got my truck and haven't really paid mind to it but now it gets kinda annoying. My ac blows out fine, on the driver side 2 vents, but the 3 on the passenger side blow out warmer air, that's not hot, but not cold. Just like it was on vent. Now, recently, my grandpa and I noticed it does the same thing on his truck which is an 03 3500. Any idea why this is happening in both of our trucks?