What 4C / 4E / nF Means
4C, 4E and nF, with 1 4C listed alongside, are one group on Samsung’s US washer article: water is not entering the machine as it should. Samsung’s steps are all about the supply side, which is why this code so often turns out to be a tap, a hose or a screen rather than the washer.
Common Causes of 4C / 4E / nF
- Supply tap partly closed or a hose kinked behind the washer
- Inlet screens clogged with sediment
- Flood-safe hose valve tripped shut
- Inlet valve or pressure sensor problem
🔧 One Safe Check You Can Try
Samsung’s sequence, in order: with the taps fully open, confirm the hot and cold hoses go to the matching inlets and are not bent, and note that Samsung advises against flood-safe style hoses on its washers; make sure the drain hose is inserted six to eight inches into the standpipe and sits properly, because a badly placed drain hose can stop a fill; then, with the washer unplugged or its breaker off for one minute, restore power and restart. If the fill is still slow, close both taps, unplug the washer, disconnect the hoses at the machine over a bowl, and rinse the small screens inside the inlets before refitting them. If clean screens and open taps still give 4C, the inlet valve or the water level sensor needs testing.
⚠ Why You Shouldn't Go Further Than That
- The inlet valve is behind the rear panel with the supply connected; testing it means live measurements that are not an owner check.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.