The answer to 'why is my ductless system blowing cold air' is that there could be several common causes, such as a refrigerant leak, a problem with the compressor, or a thermostat issue. Ductless systems, also known as mini-splits, use refrigerant to transfer heat, so if there is a leak in the refrigerant lines, it can cause the system to blow cold air instead of warm air.
Another potential cause is a problem with the compressor, which is the heart of the ductless system. If the compressor is not functioning properly, it can lead to the system blowing cold air. Additionally, issues with the thermostat, such as it being set to the wrong temperature or a malfunction, can also result in the system blowing cold air instead of warm air.