Samsung Washer 4C Error Code: Causes & Fixes

Few things are more frustrating than starting a load of laundry and coming back to find your Samsung washer stopped cold with a 4C code blinking on the display. The good news: 4C is one of the most common and most fixable Samsung error codes, and in many cases you can clear it yourself in a few minutes without spending a cent. This guide explains exactly what 4C means, walks through every likely cause from easiest to hardest, and tells you when it's time to call a technician.

What does the Samsung 4C error code mean?

The 4C error (and its equivalent 4E on front-load and older models) is a water supply error. Your washer expects a certain amount of water to enter the tub within a set time at the start of a cycle. If the control board doesn't detect enough water filling at the right rate, it halts the cycle and throws the 4C code to protect the machine.

In plain terms: the washer asked for water and didn't get enough of it. That can be a problem with the water getting to the machine, getting into the machine, or with the sensor that measures the water.

💡 Related codes to know: 4C2 specifically points to a hot/cold water connection issue (often hot and cold hoses reversed or a hot-only supply). 5C / 5E is a drain error, not a fill error — don't confuse the two.

Most common causes of the 4C error

Step-by-step fixes (start here)

Work through these in order — the first few solve the large majority of 4C errors and cost nothing.

1. Power-cycle the washer

Sometimes 4C is just a temporary glitch. Turn the washer off, unplug it (or switch off the breaker) for 5 minutes, then restore power and restart a cycle. If the code was a fluke, it won't return.

2. Check the water taps

Make sure both the hot and cold faucets behind the washer are turned fully on. A partially closed valve is a surprisingly common cause, especially after the washer has been moved or serviced.

3. Inspect the fill hoses for kinks

Pull the washer out a few inches and look at the inlet hoses. A kink, twist, or a hose crushed against the wall restricts flow enough to trigger 4C. Straighten any bends and make sure the hoses run freely.

4. Clean the inlet filter screens

This is the single most effective DIY fix. Small mesh screens sit where the hoses connect to the back of the washer, and they trap sediment, rust, and debris over time.

1. Turn off both water taps.
2. Unscrew the fill hoses from the back of the washer (have a towel ready — some water will spill).
3. Use needle-nose pliers to gently pull out the small mesh filter screens.
4. Rinse them under a tap and scrub away any grit with an old toothbrush.
5. Reinsert the screens, reconnect the hoses, and turn the water back on.

5. Test water pressure

Samsung washers need adequate water pressure to fill correctly. If you have well water or known low pressure, fill a bucket from the supply tap and see how quickly it fills. Very slow flow points to a household supply issue rather than a washer fault.

6. Check for reversed hot/cold hoses (4C2)

If you specifically see 4C2, confirm the hot hose is on the hot inlet and cold on cold. Some cycles require a cold supply; a hot-only or reversed connection triggers this variant.

⚠️ Safety first: Always turn off the water supply before disconnecting hoses, and unplug the washer before any internal inspection. Water and electricity together are dangerous — never work on a plugged-in machine with the panels open.

If the easy fixes don't work

If you've confirmed strong water flow, clean screens, and unkinked hoses but 4C persists, the problem is likely inside the machine:

Faulty water inlet valve

The inlet valve is the electrically controlled gate that lets water into the washer. If its solenoid fails or the valve clogs internally, water won't flow even though the supply is fine. A technician will test the valve's coils with a multimeter and replace it if it's dead. Expect roughly $150–$300 including parts and labor.

Faulty pressure sensor (water level sensor)

The pressure sensor tells the control board how much water is in the tub via a thin air hose. If that hose is clogged, pinched, or the sensor fails, the board can think no water is entering even when it is — producing a 4C error. Clearing or reconnecting the sensor hose sometimes fixes it; otherwise the sensor is replaced ($150–$300).

Control board fault

The least common cause. If the valve and sensor test fine, the main control board (PCB) may be misreading signals. This is the priciest repair ($200–$400) and should be confirmed by a technician before replacing.

How much does it cost to fix a Samsung 4C error?

• DIY fixes (hoses, taps, filter screens): $0
• Inlet valve replacement: $150–$300
• Pressure sensor replacement: $150–$300
• Control board replacement: $200–$400

Most homeowners resolve 4C for free with the cleaning and hose checks. Only a minority need a paid repair.

Does a home warranty cover a Samsung 4C repair?

If your washer is a covered item on your home warranty (laundry appliances are often an add-on), a failed inlet valve, pressure sensor, or control board would typically be covered as a wear-and-tear breakdown. You'd pay only your service call fee (usually $75–$150) instead of the full repair, up to your plan's cap. Clogged screens and kinked hoses are considered maintenance and wouldn't qualify — another reason to try the free fixes first.

When to call a professional

Call a technician if:

• The code persists after cleaning screens, checking hoses, and confirming good water pressure.
• You're not comfortable testing electrical components like the inlet valve or sensor.
• You see signs of a leak, burning smell, or repeated tripping.
• The washer is under manufacturer warranty (DIY internal repairs may void it).

The bottom line

The Samsung 4C (4E) error is a water-fill problem, and most of the time it's something simple: a closed tap, a kinked hose, or a clogged inlet screen you can clean in minutes. Work through the free checks first — they fix the majority of cases. If water flow is clearly fine and the code persists, the inlet valve or pressure sensor is the likely culprit and a $150–$300 repair will get you running again. Try the DIY steps before paying for a service call.

Related articles

• Washing Machine Repair Cost Guide
• LG Washer OE Error Code: Causes & Fixes
• Does a Home Warranty Cover a Washer & Dryer?
• Repair or Replace: How to Decide for Any Appliance

📌 This guide is general information for 2026 and not a substitute for your appliance manual. Error-code behavior varies by model — always check your Samsung manual and unplug the washer before servicing.