check to see if it has a superseded fan speed resistor fitted.
old style has approx. 15 fins while the new style has approx. 40
if old style fitted replace fan speed resistor
out of all bmws, e39 (your model) are the easiest
...emperature has read -40 degrees F. This was not a problem at first but now everytime I turn my air conditioner on in my car it shuts off because the outdoor temperature is reading that it is too cold for t...