The answer to 'dehumidifier blowing cold air' is that this is a common issue that can be caused by a few different problems. The most likely causes are a malfunctioning compressor, a refrigerant leak, or a problem with the dehumidifier's thermostat or control board.
If your dehumidifier is blowing cold air, it may indicate that the compressor is not working properly. This could be due to a mechanical failure or a refrigerant leak. Another possible cause is an issue with the dehumidifier's thermostat or control board, which could be causing the unit to run even when it's not needed. In some cases, the cold air could also be a sign of a more serious problem, such as a problem with the refrigerant lines or a malfunctioning fan.