Try to back off from full cold on the vent mix. Faster warmer air will transfer more heat. (from you). Eg slow moving 50° air that never reaches your face will not chill you as well as 60° air that does.

On auto and 74 where is the fan speed and will the fan speed speed/slow while changing temp?

I need to use 72 when the sun is beating on me but rarely much below that.

My wife's previous car the cabin temp sensor was weak and we would have to set lower than desired for ac and hotter than desired for heat.

On my car it will get confused once in a while and a quick flip of max on and off will snap it out of its confusion.

Use a sheet of tissue paper (or anemometer if you have one) to see if you are losing air speed or just temp up front (also get some temp measurements). "feels warm" not a diagnostic tool.

Once you get front fairly cooled off, jump in the back and turn up the intensity slowly and see if there is some setting that is the no-go level.

I have a feeling the dealer did not do the objective test Doug described but you can do it yourself.

If I can't get 50f out of my vents I rework my AC. Usually it's 42 or less in the center vents. If you don't have cold enough evaporator (test software will tell you), won't matter how fast the air, it will feel not fast because it's hot.

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