If it's just blowing semi cold air, it probably just needs to be charged. I had the same problem and my fiancee, fixed it up for me, You might also want to check if there is a leak, and I believe there is something you can buy yourself that you put in it that stops leaks, at least for awhile and if they aren't major, when he checked mine for leaks he did it at night, put the stuff in it, and used a special light, it makes it show where there are any leaks, it kind of glows a little if that makes sense.