Thought I had this figured out, but not so sure now.
Is there anyway to have only the vents open and use the fan? In otherwords, the A/C is off, but can still run fan and let outside air in.
Previous car, you could do it by turning Auto system OFF, push in AC button for on and then push AC button again to turn AC (and compressor) off. Then the vents would be open to outside and you could run the fan.
Now, if I try it, the AC comes on when I turn the fan on.
Is the system responding to the temp. setting? Example: outisde temp is 80 and system is set on 74.

 

I've done it, but it's been so freaking hot for so long I'm not sure I remember. I think mine was Auto on, bump up or down the fan speed (which turns auto off), then AC off.