Ok... First off im sorry if this is the wrong section for this.....so I have a 2004 tahoe lt with dual climate controls. My front a/c and heat work terrific. My rear a/c blows room temp and the heat works. When I first got the truck 2 years ago I didn't think the heat worked so I took off the blend door actuator I just recently got it replaced and it didn't fix my problem so I took it back off and used my hand to turn the blend door. Thays when I noticed the heat works great but the ac blows warm to room temp. I'm not an experpery nor do I know much about ac and heat on vehicles(just enough to get my by on the basics). Would anyone know where I can turn to next to look into?