Greetings,
On my 95 van with factory ac, I get cool air sometimes, and sometimes it just blows hot air. I don't think it is freon because it does cool sometime. It seems like this has happened before, and I remember something like a vacuum switch, or similar. I have noticed that it will blow cool air right after I take off from a stop. If this does sound like it might be this switch, where do I find it? Other suggestions are welcome.
Thanks,
Jim

 

It did it in my 95 truck when it had air in the lines.

 

Thanks for the reply. How do I get the air out of the lines?

 

You'll have to take it to a mechanic they've got a special machine that gets the air out and recharges it! Hope this helps!