car: 1996 Civic CX 185k D16Y7 Slushbox

problem: the other night i decided to try out my a/c by putting on a new pulley/belt and hoping the compressor works. i was lucky and the air blows cold but now i've ran into another problem. its working fine and still blowing cold but when i accelerate and in about 3rd gear, i'm assuming (40-55 mph, auto tranny), theres a loud screeching noise that goes away once i turn off the a/c. belts are still good, just sounds like that new timing belt noise if anyone knows what i'm talking about. it goes away once i turn it off and turn it back on, air still works fine and blows cold i just have no idea where the noise is coming from and would like to get rid of it as it is really loud. any help is appreciated, thanks.