The 4E error code displays the water is not entering the washer correctly. Have you cleaned out the pump filter located on the bottom left-hand corner of the washer?
Same problem, 5 years old washer, runs for 3 minutes, fills up the water, starts, but then gives the error 4e..rinse and spin works. Self cleaning also stops after some 20minute with same error. have checked all hardware possibilities, all works. The main motherboard unit was replaced 1 year ago due to some other error.
Make sure that you've cleaned and drained the debris filter at the front bottom of the washer, if that doesn't work, service would be recommended. You can use the following link to locate a service center near you: https://www.samsung.com/us/support/service/locations/.