I can not thank you enough for this post. I been watching every video, read every forum and no one had the same valuable info when it comes to recent models of jeep jku driver side blend door problems. I went to a dealer which quoted me for 750 dollars and a family member who Owens a shop told me, we will have to take the hall dash off. And supposedly it is a 5 to 6 hours labor job.
I did follow literally the steps you mentioned and booyaaaa problem solved. To give you insight of the problem I had, I owe a 2015 jeep wrangler sahara. there was no heat coming out both side of the vents. I changed the thermostat, washed/flashed the heat core, flashed the radiator and changed passenger side actuator as well. Finally
took off the panel off under the steering wheel
Took the metal panel (8 mm I think)
Took the supporting pillar metal piece of
Removed the box behind (it might be the controlling device, I am not sure)
I squeezed and wiggled around the floor duct to remove it
There I had the access for the actuator. (2 screws and unplug the power cord)
Replaced and work like the old days
so thank you again. thank you for saving me half of my mortgage payment.