There are many a/c components in a car that can cause it not to blow cold air. Some examples that may cause why your car’s a/c is not cooling can be a Freon leak, leaking a/c hose, a/c compressor is to weak or not working properly, or any restriction in the air condoning system, and even an electrical problem that will not let the a/c blow cold air, that would need an a/c electrical diagnostic.