If your AC isn't cooling, the best thing to do is call a professional to come and take a look at it. They will be able to tell you what's wrong and how to fix it. If your AC is old or outdated, you may want to consider investing in a new one - they don't have to be expensive, and there are plenty of great deals out there.
If your AC is not cooling, you may have a problem with the unit itself or the electrical wiring. It's best to call a professional to diagnose and fix the problem. If you're uncomfortable with any of the work that needs to be done, ask the technician what kind of warranty or guarantee they offer on their work. Good technicians will stand behind their work, and most reputable companies will provide a warranty on parts and labor.
