The answer to 'central air blowing hot air' is that there are several common causes, including a refrigerant leak, a problem with the compressor, or a blockage in the airflow. This can lead to symptoms like the air coming from the vents feeling warm or hot instead of cool.
Some potential solutions include checking the refrigerant level, cleaning or replacing the air filter, and inspecting the outdoor condenser unit for any blockages or damage. However, many of these issues require the expertise of a professional HVAC technician, so it's generally best to call for service rather than attempting DIY repairs on the central air system.