There are a lot of inputs into the HVAC controls. On mine the blower won't run until ECT is avout 50c when calling for heat. (which makes perfect sense and one of my favorite things about my car).

If you are only measuring the freon pressure that won't help you figure out if the clutch is being called on.

You should get the likes of foxwell (biddirectional) scanner so you can command on the AC etc to help find the problem.

The thought I have is that the variable compressor is getting stuck in neutral (clutch engaged but set to not compress) causing b your symptoms. It comes up pretty frequently on XO.

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