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Originally Posted by xsperf
i have a question, kinda off topic, maybe u can answer it bmwlotattendant, on the vents, the knob with the red and blue colors for like hot and cold, what EXACTLY does it do? i know if you have your heater on put it on red and if you have the AC on put it on blue... but it really doesnt seem to make a big difference
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i think that just regulates the outside air mixture with the the inside heated/cool air.
so if its hot outside..and you put the knobs to cold then the system only blows air that has been cooled..or not coole dif you dont have the ac on.
reverse idea with the hot air.
i think thats all it does.