The 4C (or sometimes 4E) error code dictates that there's a potential issue, but it can be a simple fix.

One of the common issues being encountered in a Samsung washing machine is the 4C or NF error code. The washer NF error code is an indication that the appliance is unable to fill with water.

A quick reference guide to help you identify and repair the problems If your Samsung front-load washer is making strange noises, stopping mid-cycle, or shaking more than usual, flashing numbers ...