Now that I have dealt with my exhaust valve problem, my A/C light flashes which indicates there is something wrong. It does work very nicely for about 15-20 minutes...so I'm hoping nothing mechanical so to speak is wrong...like the compressor or condenser. So wanting to safe money I want to just get my refrigerant topped off, but I would expect that some people would recomned I get a dye test and so forth. Could I get some feedback on this issue. Thank you very much!