It was very annoying to own almost new car with so many problems.

The A/C unit seems to have a mind of its own. It switches between blowing air through the defroster to blowing air through the vents. Sometimes it corrects itself, most of the time I have to play with the control buttons or shut it off and turn it on again. This happens in both the "automatic" and manual settings. It doesn't seem to happen when I use the defroster or heater settings. It seems to happen more often on really hot days when the A/C is on high.