rear ac blows hot

I need some info first with or without automatic A/C? Does the front a/c work normal all the time?

it does not have auto ac and the front works normal for the most part it stays cold bbut the fan goes low an high on its own

Ok the fan might be the blow motor resistor going bad but we will get to that later. I will look over the diagram of the system and see what controls the rear temp and get back to you as soon as I can.

ok thank you very much for your time

Before we get to far I need to know if you are comfortable enough to remove the overhead console in order to run some tests on the controls to see if they are working? The temp control part is what I am most interested in checking. You will also need a digital ohm meter too. The other thing I would like to check is the mode door for the rear ac actually that is what I would like to check first as it is easier to get to. Let me know what you are comfortable with doing and I will walk you through it from there ok.

Am very comfortable working on it just need a little direction

You have checked the 25 amp fuse for the rear ac? If not do that first and then I will look up the test for the blend door motor for the rear.