I agree. It seems like a software error in version 18.45.01 in my 2016 Trailhawk with dual zone HVAC. Do you have the same software version? There is definitely a problem that prevents the system from blowing warm or cool air. It only blows very hot or very cold air. Prior to software update 18.45.01 it worked fine. I have a long post about this in the topic called "Poor HVAC performance. Blend Doors?".Its a pet peeve, the manual mode is annoying too.
I see no reason to run the A/C 90% of the time so I dislike the auto system.
Its the worst when temps are between 50-70f and rain doesnt help.
You set temp to 70f, well thats what it assumes you want the air in the car to be.. it wont blow 70.. so now it blows 75f, meanwhile the a/c kicks off and windows fog up..
a couple mins later it kicks the A/C on and air is 60f or lower out of vents and it wont defrost worth a crap.
You can make it more stable by forcing the A/C on with button.
I'd like to set it for 70f and it blows 70F air. but that never happens 70F might be 45F air or 80F depending on what it thinks conditions in the car are.
The base version I like better.. I set it middle of the heat setting and it blows if I get hot I bump it down a notch.. if I get cold I bump it up a couple notches.
The auto version even on manual reacts like a crackho chasing her next fix.. I can make it do what I want mostly.. but its more adjusting than the base climate control.
It works best when its either cold or hot. not so great inbetween.. I'm just not sure how this auto system is an improvement over the base climate control where I set a temp and it blows that temp. I am capable of telling it what temperature I want the air out of the vents to be.. I have adjusted what I do to compensate for it though.
I was also annoyed when my ford ranger ran the A/C in every setting except floor or vent, yes if you put it on floor/vent it ran the A/C