I VE HAD MY SYSTEM REGASSED TWICE RECENTLY , BUT THE GAS SEEMS TO LEAK OUT SOMEWHERE , THE TECHNICIAN CANT FIND A LEAK WHEN ON PRESSURE TEST BUT NOW THERE IS A HORRID (COW PAT SMELL )WHENEVER I TURN IT ON AND OFF COURSE NO COOL AIR , I CANT KEEP USING THIS SAME GUY AND NEED ADVICE WHAT TO DO NEXT , THANKS MICHAEL