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AC Button Help!!!
Okay so I have to this for long time but couldn't find the answer. Also I'm new here.
So I have a BMW F10 and my question is simple. Do I need to turn on the AC button when I'm using the heat? Recently I had radiator fan issue and someone told me that it happened coz I never turned on my ac button while using heat?? They said I need to keep the AC button on at all times. Is it true and why?
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