The answer to 'mini split blowing cold air' is that the most common causes are a refrigerant leak, a malfunctioning compressor, or an issue with the thermostat or control board. Symptoms include the unit blowing only cold air, even when set to heat, and the air becoming progressively colder. Solutions may involve repairing the refrigerant leak, replacing the compressor, or troubleshooting the thermostat or control board.
For minor issues, some DIY troubleshooting and repairs may be possible, such as checking the air filters or resetting the thermostat. However, for more complex problems, it's best to call in a professional HVAC technician who can properly diagnose and fix the issue to ensure safe and efficient operation of the mini split system.