I checked each setting to make suer no other factor causes the difference.
All settings are the same.

However, yesterday afternoon, when I got home, I took a digital thermometer to take the
temperature, it's 2.4 C on the right air outlet and 2.1 C on the left.

I don't think my skin can tell the 0.3 C, but I can truly feel it is different. I think with
the 0.3 C difference, BMW probably won't do anything for me.

Craig,
BMW technician told me that may be the valve between the air and the hat water pipe is malfunctioned. (I have not told him about the 0.3 C difference.) He wanted me
to take the car to him.

FYI!