I have been having this problem since I got the vehicle and had it to the dealer 3 times already each time I got an oil change; somehow they seem to think I am imagining the problem but keep replacing pieces, including the air/mix unit twice.

You will start out fine, then say 30 minutes later, without moving the temperature, the car either gets REALLY COLD or REALLY HOT, or the windows fog up. If it gets too cold, you have to really push the temp way up (to say 80ish) before you get hot air. Same with hot, you need to hit 60 or its hot air. As for the fogging of the window, it’s like its trying to recirculate the air, even though it’s on full auto and recirculate is off. I, not being overly car savvy, would assume it was the thermostat, either internal or external, or maybe the sun sensor.

Anyone have similer problems so I can tell them what to fix?! It is just plain annoying!