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 blocked airflow. Symptoms may include the air conditioner running but not cooling the home, warm air coming from the vents, and high energy bills. To troubleshoot, first check the air filter and make sure it's clean. If that doesn't resolve the issue, you may need to call an HVAC professional to diagnose and repair the problem.
Trying to fix a central air conditioning system with hot air blowing can be dangerous if you don't have the proper training and equipment. It's generally best to call an HVAC technician, as they have the expertise to safely identify and address the root cause, whether it's a refrigerant leak, compressor failure, or some other issue.