I got a 2009 aveo LT and it's not blowing cold air. The compressor is not the problem. I brought it to a Mr tire and they said i had a blockage in the system and the total cost would've came out to almost $800. I got a buddy that is ac certified and we bought and installed a new condenser, accumulator and expansion valve (which are the parts mr tire said they needed to replace). We charged the system and everything looked good, except for the fact the ac is still not working. There a no leaks either. Any suggestions?