Air conditioning that does not work can be attributed to leaks, faulty compressors, clogged filters, faulty cooling fan, faulty radiator, or uncharged AC, for example. There are some makes/models known for defective air conditioning systems that must be constantly recharged to blow out cold air, for example. Although a faulty air conditioning system might seem like a minor problem, it definitely is a major issue in places where hot weather is common. In addition, air conditioning issues can also point to electrical issues.