Preformed prepaid maintenance on a Goodman split heat pump unit, model and serial number match in the system. Checked the filter and checked pressures and cleared drain line. Cleaned coils and added mildew destroyer to drain line for added drain line protection. Checked temperature split and checked air flow. Recommended and installed Blue Tube Kit for unit due to growth formation inside the air handler. This is for air quality. All systematic components are working properly at this time.