What is the Black stuff coming out of Goodman mini split?

The black stuff coming out of a Goodman mini-split system is often mold, mildew, or dirt buildup that has accumulated in the drainage system or on the evaporator coils. This can occur if the system is not regularly cleaned and maintained, leading to moisture accumulation. It's important to address this issue promptly, as it can affect indoor air quality and system efficiency. Regular maintenance and cleaning can help prevent this problem.