rear air not cooling
 

I own a 2005 Chrysler T&C and have never had any issues with the front or rear A/C. I always drive or ride up front, so have only really just been in the comfort of the front A/C.

Earlier in the spring, I had the 'priveledge' to ride in the back of the van and when the rear A/C was on, it was only blowing semi-cool air (not much cooler than the inside of the van while sitting in the hot sun).

I played with the switches on the dashboard: made sure the return air was on return air and the 'snowflake' was 'on'.

Still, the front A/C was cooling fine but the rear air was not cooling at all.

What could be the reason or problem as to why the rear A/C isn't cooling?

Any help or advice would be great.