Hi Veronika,
I didn't realize the midday sun is more important than the compass direction. I would suggest you use compass instead of depending on the direction of the midday sun. Feng Shui was started in China and developed around asia then transferred to europe. You see when Marco Pollo bring FS to Europe, it is most likely that he uses the chinese method.
As Master Marie said, when doing the compass reading we are looking for the FS North not a magnetic North (as pointed by the red needle in the compass).
