The answer to 'air conditioner 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. Symptoms may include the air coming out of the vents feeling warm or hot, the AC running constantly without cooling the home, and high energy bills.
Some potential solutions homeowners can try include checking and replacing the air filter, clearing any debris or obstructions around the outdoor unit, and ensuring the thermostat is set correctly. However, more complex issues like a refrigerant leak or compressor failure will likely require a professional HVAC technician to diagnose and repair.