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I want to clarify that we seem to have 2 different AC issues at hand.
One appears to be a complete compressor failure with no AC working and the other is a randomly working one.
Ours works like a few others have mentioned; when working the air comes out cold (AC) or normal to warm while operating (switching back/forth). This normalizes when set to 68 degrees or lower and then just blow cold.
Stop the car for even a minute or two; the AC will not work whatsoever or it may.
I was told that the evaporator is freezing up due to some software issue. While I believe it is software due to the random behavior I think it has nothing to do with the evaporator. Hard to believe it would freeze up in a minute to two...
Likely this is all a software problem (probably some conditional logic which seems to be BMW's specialty).
Our compressor was tested good...
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