4-Zone AC question - blower working, no cold air, no air through center vents

[rob76turbo]

Hello everyone,

 

LONG time no post. I have a 2004 CT with 4-Zone AC. It's a new car for me so still discovering what works...and what doesn't. So tried the rear AC for the first time. The blower blows plenty strong, but the air only comes from the floor vents and b-pillar vents. Nothing from the rear center vents. Then the air is not cold. 

 

How do you access the system to check for the freon level? How do you access the control for the center rear vents?

 

Any ideas, fixes or common problems I should look for? 

 

As always, thank you all for any advice / feedback!

[ecruiser]

Check this topic. You will find out the answers to most of your questions. If you plan to DIY, good luck. Definitely not a fun job.