The answer to 'why is my air conditioner blowing hot air' is that there could be several common causes, such as a refrigerant leak, a problem with the compressor, or a blocked airflow. If your AC is blowing hot air instead of cool air, it's likely that there is an issue with the refrigerant system or the airflow through the unit.
Some of the most common symptoms of an AC blowing hot air include the unit running constantly but not cooling the home, the air vents feeling warm instead of cool, and high energy bills. These issues can be caused by a refrigerant leak, a malfunctioning compressor, a clogged air filter, or other problems in the HVAC system.