The temperature dial on the climate control models (00-01) is calibrated with only slight fan speed variations except at the ends - if you click far left or far right it goes to the extreme or max setting. So if you have it swung far left with auto off and it's colder outside than inside, it opens up the fan to blast full out. The opposite is true for heat - far right and the heater is drawn with full fan. The middle of the dial, instead of being truly graduated from the two extremes, is more like the middle range between mid-cold to mid-hot (my experience).
-- John