The AC compressor won't kick on for a bunch of different reasons to prevent damage to the system.

The AC doesn't require the electric fan to operate but the engine will overheat much easier without the fan running.

I have a feeling the system was coincidentally low on "freon" and possibly now it's low enough that it won't turn on.

You could have the pressure tested and some R134a added if that's the cause of your AC not engaging. (Any competent mechanic could do this)

As you've figured out the AC does not need the secondary fan when the car is moving at over about 50kph


Sent from my iPhone using Tapatalk Pro

__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)