Our rear a/c has decided to start blowing hot now. Not good here in South Bama. Front is just fine and both have good flow. Any help on where to start would be much appreciated!!!!

 

If front a/c is working fine I would suspect a bad temperature door actuator in the rear unit.

 

Pulled everything apart and did find that door not operating. All vids I found of it had thr actuator mounted in front side of unit.....I can 100% say on a 2009 it is on the back side of the unit. Made it interesting to get it out.

Thank you for your advice.