I read with interest about the climate control on GE Jazz and it's problems. We do a longish journey once a fortnight and was waiting till we did that to put my twopenneth in. The car is a 2010 EX GG6. When I bought the car, not being very good about reading the instructions on climate control, left it as it was. Last Thursday, was the long trip day and was a bitterly cold so I tried to set the climate control to see if I could improve it. Well, I couldn't.
The climate control is set to Auto, I leave the fan speed a two bars and the temperature at 20 degrees. As it was bitterly cold day, I set the recirculation and both front and rear screens buttons. After a short distance, I set the normal button where it shows air through the car. This switched the the recirculation button off and I switched the other two off as well. The journey as always was in a warm car no problems. Even after the car had been standing for nearly two hours, we had warm air immediately.
Could it be that at 22 degrees, the system is trying to keep the temperature at a even level. Consequently when the temperature rises above the 22 mark the cold air comes in to bring it down. I usually drive in outdoor clothes so maybe I do not notice such changes. I will add that I did have to put the fan speed up to four to clear a bit of misting on the drivers window but only for a few minutes.
As I said my twopenneth. Perhaps I am lucky and my climate control is working properly. Whatever good luck.