Samsung Washing Machine Error Code 4C — Water Supply / Not Filling
The 4C error code means your Samsung washing machine is not getting enough water to start or complete a cycle. The most common causes are a closed water valve, a kinked supply hose, or a clogged inlet filter. This is usually a 10- to 20-minute DIY fix with no tools and no parts. If the code persists after checking the supply, the water inlet valve or control board may need professional replacement.
What the 4C Code Means
The Samsung washing machine error code 4C is a water supply error that indicates the washer cannot detect adequate water flow. The control board triggers this code when water fails to reach the drum within a set time after the fill valve opens.
This code appears across most Samsung front-load and top-load washer models. You may see it flash at the start of a cycle or partway through if the washer loses water pressure during a rinse.
Samsung uses a few related codes for water supply issues. The 4C and 4E codes mean the same thing on most models. The 4C2 code is different — it specifically means the washer is getting hot water when a cold-water cycle was selected. If you see nF on an older Samsung washer, that is also a no-fill error with the same root causes as 4C.
Because the most common causes are external to the machine, 4C is one of the most DIY-friendly codes on a Samsung washer. Work through the steps below in order before assuming a part has failed.
Common Causes — Most Likely First
How to Fix the 4C Error — Step by Step
Unplug the washing machine
Unplug the washing machine from the power outlet. Wait 30 seconds. This clears the error from the control board and gives you a safe starting point.
Check both water supply valves
Locate the hot and cold faucets behind the washer. Turn each valve counterclockwise until fully open. Even a quarter-turn short of fully open can reduce flow enough to cause the 4C error.
Inspect the water supply hoses
Pull the washer forward carefully and look at both hoses running from the wall valves to the back of the machine. Straighten any kinks, bends, or tight loops. Replace any hose that looks cracked, swollen, or damaged.
Clean the inlet mesh filters
Turn off the water supply valves first. Unscrew the hoses from the back of the washer. You will see small mesh screens inside the hose connection ports. Gently pull them out with needle-nose pliers and rinse them under running water until clear. Reinstall them before reconnecting the hoses.
Test water pressure at the hoses
Hold a disconnected hose end over a bucket and briefly open the valve. Water should flow in a strong, steady stream. If the flow is weak, the problem is with your household plumbing, not the washer.
Check for frozen lines (winter months)
If the washer is in a garage, basement, or unheated area, feel the hoses for ice. Let them thaw naturally or warm the area before running the washer again.
Plug back in and run a test cycle
Select a short wash cycle and watch to confirm water fills the drum within the first few minutes. The 4C error should not return.
When to Call a Technician
Most 4C errors are resolved with the DIY steps above. Book a professional repair if:
- The 4C error comes back immediately after a reset and you have confirmed the water supply is fully open and flowing
- Water is leaking from the back of the machine near the inlet valve connections
- You hear a buzzing or humming sound from the back of the washer when the cycle starts, but no water enters the drum — this usually means the inlet valve is stuck or burned out
- The washer displays 4C on every cycle regardless of the wash setting selected
- Other water-related codes (nF, 4E, 4C2) start appearing alongside or instead of 4C
How Promix Repairs Samsung Washing Machine 4C Errors
When a Promix Appliance Repair technician arrives for a Samsung washing machine 4C error, the first step is a full diagnostic. The technician tests the water inlet valve with a multimeter, checks the wiring harness for continuity, and inspects the pressure sensor and control board for faults. This pinpoints the exact failed component rather than guessing.
The most common repair for a persistent 4C code is replacing the water inlet valve. Promix carries common Samsung washer parts, so most repairs are completed in a single visit. If the control board is the issue, the technician will explain the repair and provide a quote before starting work.
Promix Appliance Repair has over 10 years of experience with Samsung washer and dryer repair. All repairs include a warranty on parts and labor. A service call fee applies and is credited toward the repair if you choose to proceed.
Repair Cost Expectations
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Frequently Asked Questions
Can I keep using my Samsung washing machine with error code 4C?
No. The washer will not fill or complete a cycle while the 4C code is active. Running the machine without adequate water can also stress the motor and pump. Clear the error first by checking the water supply before attempting another cycle.
Will resetting my Samsung washing machine clear error code 4C?
A reset (unplug for 30 seconds, plug back in) will clear the code from the display. However, if the root cause is still present, the code will return as soon as you start a new cycle. A reset is a good first step but is not a permanent fix on its own.
How long does it take to fix Samsung error code 4C?
If the fix is something you can do yourself (opening a valve, cleaning a filter, straightening a hose), it takes 10 to 20 minutes. If a technician needs to replace the water inlet valve, most repairs take under an hour. Control board replacements may take slightly longer.
Is Samsung error code 4C covered under warranty?
If your Samsung washer is still within the manufacturer's warranty period (typically one year for parts and labor), a water inlet valve failure may be covered. Check your warranty documentation or contact Samsung directly. For out-of-warranty repairs, Promix Appliance Repair provides its own warranty on parts and labor.
Does Samsung error code 4C mean my washer is leaking?
Not necessarily. The 4C code indicates the washer is not getting enough water, not that water is escaping. However, if you notice water on the floor near the washer at the same time as a 4C error, check the supply hose connections for loose fittings or cracks.
Can a clogged drain cause Samsung error code 4C?
No. The 4C code is strictly a water supply (fill) error. A clogged drain would trigger a different error code, such as 5E or nd. If you are seeing both fill and drain errors, there may be a broader issue that a technician should evaluate.