There are many reasons why some Samsung washer models, such as the Samsung front loader washer, will not be able to fill in water and shows nF code. Aside from damaged hoses, faulty controls and switches, frozen water supply lines could also be one of the reasons. This could happen during winter seasons. If you are experiencing this issue in an area with very low temperature, make sure that the water supply valves and lines are not frozen to allow a proper water flow.