Samsung Washer 4C Code: Water Supply Problems Explained

What does the 4C code mean on a Samsung washer?

The 4C code is Samsung's water supply, or "not filling," error. On its US error code page, Samsung groups 4C, 1 4C, nF and 4E under one heading and says the code means "water is not entering the washer correctly" ^[1]. The page covers Samsung washers in general rather than one model series, and Samsung does not say which display shows which variant. The checks are the same whichever variant your display shows.

Two nearby codes are easy to confuse with it. 4C2, 4E2, nF1, CE and 14C2 mean the hot and cold hoses are swapped, so very hot water is coming through the cold inlet. Samsung says that code does not mean the washer needs service; you reconnect each hose to its matching inlet ^[1].

Samsung dishwashers also show 4C or 4E, as a water supply error tied to pressure or temperature ^[5], so make sure the code came from the washer. If you are not sure which brand or appliance a code belongs to, check it in our error code lookup.

What causes a Samsung washer 4C error?

Most causes Samsung lists sit along the supply path: water runs from the hot and cold taps through two inlet hoses, past a mesh screen at each inlet, and into the inlet valve. Samsung also lists the drain hose and, on its UK and Australian pages, a blocked detergent drawer.

Cause	What you may notice	First fix
Tap not fully open	Valve handle partly turned; weak or no fill	Open both taps all the way
Kinked or pinched inlet hose	Washer pushed tight against the wall	Pull the washer out and straighten the hose
Hoses swapped or Flood Safe hoses	Recent install or hose change	Hot to hot, cold to cold; use standard hoses
Clogged inlet mesh screens	Slow fill that got worse over time	Shut taps, unplug, clean the screens
Low household pressure	Weak flow at other faucets too	Contact your water utility or a plumber
Cold-only hookup in winter	Error starts in cold months	Add a hot line or use Tap Cold, if offered
Blocked detergent drawer	Residue or a blockage in the drawer	Remove, clear and refit the drawer
Kinked or misplaced drain hose	Drain hose bent or pushed too far in	Straighten it; set the depth your manual gives
Possible inlet valve or control fault (Samsung does not name the part)	All the checks above pass	Request Samsung service

Taps that are not fully open. Samsung asks owners to keep the water supply valves fully open while the washer runs ^[1].

Kinked, pinched or wrong hoses. Samsung's fill guide says the hoses must not be "bent or kinked or pinched shut," should be replaced if damaged, and must not be Flood Safe hoses ^[2]. Samsung does not explain the Flood Safe rule, so we simply pass it on.

Clogged inlet mesh screens. Samsung's care guide for its Bespoke AI Laundry Combo says a clogged inlet mesh filter will trigger a 4C code. The same guide recommends cleaning the mesh filter once or twice a year ^[3]. Samsung's US error page also says debris from the supply is filtered and enough buildup can block the water ^[1].

Low water pressure. Samsung Australia notes that recommended pressures vary by model ^[6]. Samsung UK gives 0.5 to 8 bar (roughly 7 to 116 psi) for its models and says low mains pressure or flow is the usual cause of 4C or 4E ^[4]. Check the range in your own user manual, because US models may list a different figure.

A cold-only hookup in winter. This one surprises people. Samsung says a washer installed in summer with only a cold line can stop and show an error when it gets cold in winter, even on the Cold setting, because that setting still tries to mix in hot water below 60 °F. Samsung's fixes are to connect a hot water line or use a Tap Cold or Coldest setting if your model has one ^[2].

How do you fix the Samsung washer 4C code?

Work from the outside in, and stop as soon as the washer fills normally. Most checks need no tools.

Step 1: Open the taps and straighten the hoses

Pull the washer a few inches from the wall so you can see both supply hoses. Turn each tap fully open. Follow each hose from the tap to the washer and free any kink or section pinched behind the cabinet. Samsung UK also suggests unplugging the washer before you pull it forward ^[4].

Step 2: Check the hookup

Make sure the hot hose runs from the hot tap to the hot inlet, and cold to cold. Samsung's guide for the swapped-hose code says blue typically goes to blue and red to red ^[1]. Replace any Flood Safe or damaged hoses.

While you are behind the washer, look at the drain hose too. Samsung's 4C steps include checking that it is not kinked and is inserted into the drain pipe ^[1]. Samsung's page gives two different insertion depths (6 to 8 inches in one section, no more than 6 inches in another), so use the figure in your manual.

On a front-load model, check the detergent drawer as well. Samsung's UK and Australian pages say a blocked drawer can also cause a 4C message; Samsung UK's fix is to remove the drawer, clear any obstruction and refit it ^{[4] [6]}.

Step 3: Reset the power and run a cycle

Samsung says to unplug the washer or switch off its circuit breaker for one minute, restore power, and run a cycle ^[1]. If the drum fills, keep the taps fully open from now on.

Steps 4 and 5: Clean the screens, then test again

If 4C returns, clean the inlet screens as described in the next section, then run another cycle. If the error persists, Samsung directs owners to its Support Center to request service ^[1].

How do you clean the inlet filter screens on a Samsung washer?

Each inlet on the back of the washer has a small mesh screen that catches debris from the water supply. Turn the washer off, unplug it and shut both water taps before you loosen a hose. The hose still holds water, so keep a towel and a shallow pan ready.

1. Turn the washer off and unplug the power cord.
2. Close both water taps, then loosen and disconnect each hose from the back of the washer.
3. Cover the end of each hose with a towel or cloth to catch dripping water.
4. Using pliers, gently pull the mesh filter out of the inlet valve.
5. Rinse or soak the filter in water, then let it dry completely.
6. Push the filter back into the inlet valve and reconnect each hose to its matching inlet.
7. Open the taps, check every connection for drips, then plug the washer in.

These steps follow Samsung's US care guide for the Bespoke AI Laundry Combo ^[3]; Samsung UK gives the same order for its washers, ending with a check that every connection is watertight ^[4]. Hose fittings and screen shapes vary by model, so check your user manual if yours look different. Do not force a screen that will not come out; leave it for a technician rather than damage the valve.

What if the hose is frozen or the water pressure is low?

Frozen hoses. If the washer sits in an unheated garage or basement, a hose or supply pipe can freeze. In our view the safe approach is to let the space warm up gradually and never to use an open flame on a hose or pipe. If a supply pipe may have split, shut off the water and call a licensed plumber before you run the washer again. If the error appeared only after the weather turned cold and the washer has a cold-only hookup, read the winter note above: Samsung says that setup alone can trigger an error.

Low pressure. Open a nearby faucet. If flow is weak there too, the problem is the household supply, not the washer, and a plumber or your water utility is the right call. If other faucets run strong, go back to the taps, hoses and screens behind the washer.

What if the 4C code keeps coming back?

If 4C returns after the taps, hoses, hookup, drain hose, detergent drawer and inlet screens all check out, the washer needs Samsung service. Samsung says so directly ^[1]. Samsung does not name the failed part; in our reading the inlet valve, its wiring or the control are what remain once water reaches the back of the washer freely.

The inlet valve is an electrical part inside the cabinet. We do not recommend opening the cabinet or replacing a valve yourself unless you are trained. One safety point works the other way: Samsung says that if a washer keeps filling and will not stop, turn off the water valves and request service ^[2].

Other water and drain codes have their own guides. On LG washers, the LG IE code is the inlet error and the LG OE code is a drain error. If the drum fills but will not spin out, see our guide to a washer that won't spin. You can browse every Samsung appliance guide.

How can you prevent the 4C code?

• Clean the inlet screens once or twice a year. That is Samsung's interval for the mesh filter on its Laundry Combo ^[3]. Samsung UK suggests at least twice a year ^[4].
• Leave a gap behind the washer and keep the taps fully open. Check both after any move or plumbing work.
• Plan for winter. In a cold laundry space, connect both hot and cold lines, or use Tap Cold if your model has it.

For other washer problems, see all of our washer repair guides.