I just got my Buderus GB142-30 installation finished by my contractor today. It's not quite working yet. One question that I have is that on the AM10 outdoor reset controller, the temps are shown in celcius. I can not for the life of me figure out how to change it to fahrenheit. The fahrenheit symbol lights up for a second along with all of the other displays on the screen when I first power everything on. Can I change the display to farenheit? I was thinkning that maybe I got an AM10 meant for another country or something. The instructions and online info are next to nothing. Thanks in advance.