This LG Washer Dryer had a drying problem. The model in this video is the WM3431HS. The procedure in this video should be similar for all LG washer dryer combo units. The auto dry function no longer worked and the dryer was not getting the clothes completely dry.
This video shows how to clean out the tube at the back of the appliance. This tube over time will get clogged with yuck and cause dryer problems. One upgrade that is suggested for this machine is stainless steel braided water supply hoses: http://amzn.to/2aEhpgL