Rear AC Vents Barely Work

[Kimber]

Super old thread but if it is helpful my rear vents don’t work at all in auto mode. only if i hit the middle vent button (the one pointing at the cartoons neck). See pic. then they are totally adequate.

 

[Donmatteo]

My 18 had the same issue and my 19 has the same issue.

What's I've found is A/C on MAX, recycle on, body on, and feet on. The footwell blower is about a 100% air flow improvement over the console.

 

[TwizzleStix]

In my 2018 802A in Auto (not necessarily Dual), the rear top vents follow the front top vents. If the front heater vents are auto-selected, the rear heat comes from under the seats, not from the top vents. Note that the front fan speed will control how much air comes from the rear vents, top or bottom.