Meaning
4C on a Samsung washer means the machine cannot fill with water correctly — it started a cycle but the expected amount of water did not arrive in time. The most common reason is a restricted water supply, so the very first check is that both wall taps are fully open and the fill hoses are not kinked.
⚠ Safety first. Turn off the water supply taps before you loosen or remove any fill hose, and unplug the washer before servicing it. The hoses and inlet fittings hold residual water, so keep a towel and a shallow tray ready to catch the spill.
What the Samsung 4C code means
The 4C code is a water supply error. During fill, the washer measures how fast the tub is filling. If it does not reach the target water level within the allowed time, it stops and reports a supply fault. On many panels the same fault appears as 4E, and on older Samsung models it can show as nc — all three are the same water inlet problem. The washer is telling you that water is not getting in fast enough, not that a single specific part has failed, so the fix is a process of checking the supply path from the tap inward.
Most likely causes (ranked)
| Likelihood | Cause | What is happening |
|---|---|---|
| Most common | Tap closed or hose kinked | A wall tap is off or only partly open, or a fill hose is kinked, crushed, or frozen, so flow is choked off. |
| Very common | Clogged inlet mesh screens | Fine mesh filters sit inside each hose connection on the back of the washer and trap grit and mineral scale, slowly starving the fill. |
| Common | Low household water pressure | Mains pressure below the required range means the tub cannot fill fast enough, even with taps wide open. |
| Less common | Blocked dispenser drawer | Detergent sludge in the drawer or its housing restricts the water that passes through on its way to the tub. |
| Least common | Faulty water inlet valve | The valve coil has failed or stuck, so it does not open on command even when supply and screens are fine. |
How to fix it, in order
- Confirm both taps are fully open — trace each hose back to the wall and turn hot and cold taps all the way on. This clears the fault more often than anything else.
- Unkink and inspect the hoses — pull the washer forward and make sure each hose has a smooth, wide bend with no crushed spots. In cold climates, rule out a frozen hose.
- Test the pressure and flow — the supply should sit within roughly 0.5 to 8 bar. If a nearby tap trickles, the problem is your household supply, not the washer.
- Clean the inlet mesh screens — turn off the taps, unscrew the hoses from the back of the washer, and use needle-nose pliers to gently pull the small mesh filters out of each inlet. Rinse them under running water until clear, then reseat them.
- Check both hot and cold inlets — a dual-valve washer can throw the code if either side is starved, so clean and confirm flow on both connections, not just one.
- Clean the dispenser drawer — remove the drawer, wash out detergent buildup, and clear the housing so water can pass freely.
- Reconnect and run a rinse — reattach the hoses hand-tight plus a small additional turn, restore the taps, and start a short rinse or spin cycle to test the fill.
- Suspect the inlet valve last — if supply, hoses, screens, and pressure are all good and the code returns, the water inlet valve is the likely failed part and should be tested or replaced.
Parts that may be involved
- Water inlet valve — the electrically controlled valve that opens to let water in; a failed coil or stuck valve is the usual hardware cause.
- Inlet mesh filter screens — the small removable strainers inside each hose connection that clog with sediment and scale.
- Fill hoses — the hot and cold supply hoses; replace any that are kinked, split, or crushed.
- Detergent dispenser drawer — if buildup in the drawer or housing is restricting flow, cleaning or replacing it can clear the code.
Difficulty and time
The supply checks and screen cleaning are beginner-friendly and take about 15 to 30 minutes with basic hand tools: a towel and tray, needle-nose pliers, and a Phillips screwdriver. Testing or replacing the inlet valve is a moderate job that needs a multimeter and removal of the top panel, and it can take an hour or more.
When to call a pro
- The code returns after the taps, hoses, screens, and pressure all check out.
- You are not comfortable using a multimeter to test the inlet valve coil.
- The inlet valve, wiring harness, or control board appears damaged, scorched, or corroded.
- Household water pressure is consistently too low and needs a plumber rather than an appliance fix.
FAQ
Is 4C the same as 4E on a Samsung washer?
Yes. Newer Samsung panels display 4C and older ones display 4E (or nc) for the exact same water supply fault. Follow the same checks regardless of which one you see.
How is 4C different from 4C2?
They are not the same. 4C2 is a hot water error: the washer detects water that is too hot on the cold inlet, usually because the hot and cold hoses are reversed (match blue to blue, red to red), or the hot supply is simply too hot — some repair sources put the trigger around 50 degrees Celsius. For 4C2, confirm the cold hose feeds the cold inlet and the hot hose feeds the hot inlet before anything else.
How often should I clean the inlet mesh filters?
Cleaning the mesh screens about twice a year prevents sediment and scale from building up and is the simplest way to avoid a repeat 4C code, especially in hard-water areas.
Sources & verification
- Samsung UK — “How to resolve a 4E or 4C error code on a Samsung washing machine”. Manufacturer source that 4C/4E is a water-supply fault, that the hose mesh filters should be pulled and rinsed, and that supply pressure must be between 0.5 and 8 bar. Accessed 20 July 2026.
- Samsung US — “Samsung washing machine information and error codes”. Manufacturer source grouping 4C/4E/nF as “water is not entering correctly” and defining 4C2/4E2 as a hot-water fault caused by reversed hot/cold hoses. Accessed 20 July 2026.
- iFixit — “How to Troubleshoot the 4E or 4C Error Code on a Samsung Washing Machine”. Repair-authority source for the inlet-screen sediment cause and testing the water inlet valve as the failed hardware component. Accessed 20 July 2026.
See all washer error codes, the full Samsung error codes guide, or the related Whirlpool F21 drain code.