skippr88

Did some searches and got a lot of good info, but it seems no two A/C problems are alike in some cases. This weekend - Just purchased my 88 'lude was told A/C doesn't work and needed TLC by previous owner. Thought I would ask for feedback. I plan to take it to an A/C shop regardless, but I'd like to be a little more informed. Here's what I do know:
These issues may or may not be related.
1) A/C condenser fan kicks on and stays on all the time. Never shuts off. I have to remove the condenser fan relay just to shut it off.
2) auto store checked Condenser fan relay. It is good.
3) A/C Compressor kicks in and runs when A/C button is pressed.
4) A/C button light stay's green all the time.
5) A/C is not blowing cold air.
6) previous owner says the system was charged and not leaking
7) system had been converted to 134 sometime back.
8) (probably not related - but check engine light on - Code 7, Throttle Angle)
9) Have re-set computer, no change.

I would tend to think it just needs freon, but the previous owner says he tried that and it didn't fix it. Any ideas? Thanks for your help.