The answer to 'AC blowing cold air' is that there are several common causes, including a refrigerant leak, a problem with the compressor, or a blocked air filter. Symptoms may include the AC unit running constantly, the air coming out of the vents feeling colder than normal, and high energy bills.
If the AC is blowing cold air, the first thing to check is the air filter. A dirty or clogged filter can restrict airflow and cause the AC to work harder, resulting in cold air. You can try replacing the filter yourself, which is a quick and easy DIY fix. However, if the problem persists or you suspect a more serious issue, it's best to call in a professional HVAC technician to diagnose and repair the problem.