A/C worked fine,next day,nothing but hot air. I assumed it was low on 134,but it wont take any. Compressor wont come on and control panel screen is all lit up with all options showing,heat,def,a/c,fan,but nothing works ! What has happened ? I'm almost scared to ask for fear of $$$$$ answers !

 

The reason it won't take any is because the compressor won't come on.
There could be any number of reasons, but a good place to start would be to check all the fuses.
Lets hope my suggestion is not all hot air too!

 

HaHa. Yeah,now its raining ! Anyway,yep,I'll check em all again. I had a couple relays I swapped,that did nothing,and fuses looked ok too. It was suggested I pull out contropl center and disconnect it,then re connect as to re-set. Well, I guess.

 

Don't want to send you on a wild goose chase, but if you have a test lite you might want to confirm voltage going from the relay to the compressor clutch. Do you have the owner's manual? It should tell you which relay is for the A/C. When you call for A/C operation you should be able to feel the relay energize. If you can feel that, then I would suspect the output of the relay to the clutch which also goes through the hi and low pressure switches. If you don't feel the relay work, then the signal from inside the vehicle isn't getting out to the relay.