1996 Ford Windstar A/C issues. Cold in the front hot in the back.?

I have a 1996 Ford Windstar with 2 problems with the A/C(dual system). When you turn the A/C on it blows cold as ice in the front and really hot in the back and then after a couple of minutes the A/C including blower shuts off and on constantly. What the heck is going on? Someone Please help?

1996 Ford Windstar A/C issues. Cold in the front hot in the back.?
I used to have a 1998 Windstar that blew hot air in the back when I had the a/c on. My husband mentioned it to our mechanic and he said he couldn't check it unless it was doing it at the time and I guess it wasn't. The only thing that worked for me was to turn the rear air on while the motor was off. Then it usually blew the cold air. If I turned the control off and tried to turn it on while the motor was running, it would blow hot. If you can get it to blow cold at all then leave the controls alone and don't change them. The times mine would blow hot, I just had to turn the rear air off and forget about it. It's a pain but things could be worse.
Reply:there could be a number of things going on. you don't want to guess at issues like this, go pay the fee to get a diagnostic done and you can go from there