The answer to 'ductless system blowing cold air' is that there could be several common causes, such as a refrigerant leak, a problem with the compressor, or an issue with the thermostat or control system. Symptoms may include the system running constantly, poor airflow, or the air getting colder over time.
Some potential solutions include checking the refrigerant level, cleaning the air filters, and ensuring the thermostat is set properly. However, many ductless HVAC issues require professional diagnosis and repair, so it's best to call a qualified HVAC technician if the problem persists or you're not comfortable troubleshooting it yourself.