Ive been searching online about installing a new thermostat in my 240. I went to the dealer to get a made in Germany one as the after market ones seem to be well--unpredictable. I haven't installed a thermostat myself in ages, but I will this time, however there�s something I am trying to remember or find about it online but no luck so far. The stat has a little sort of floating pin� in a small hole on it. If I remember correctly that �pin� must be installed with it at the top OR close to the top like at 11 o�clock or 1 o�clock-I just cant remember. exactly how that is supposed to set? Thank you