
Samsung makes high-end, super-reliable appliances, but even the most trusted appliance can experience issues. If your Samsung washer displays the 4C error code, this usually indicates a problem with the water supply. Although this might sound daunting, don’t panic! There are a number of simple DIY solutions you can try that will solve the issue in no time. Let’s get started!
This guide applies to all commonly used models of Samsung washers, including:
WF209ANWXAA
WF210ANWXAA
WF218ANWXAA
WF328AAWXAA
WF330ANB/XAA
WF330ANBXAA
WF330ANW
WF330ANWXAA
WF331ANW/XAA
WF350ANPXAA
WF350ANW/XAA
WF350ANWXAA
WF419AAWXAA
WF42H5000AW/A2-0000
WF448AAPXAA
WF448AAPXAC
WF448AAWXAA
WF448AAWXAC
WF520ABPXAA
WF520ABWXAA
WFJ1254XAA
Reset your washing machine
Before you start looking into plumbing and water supply issues, we recommend resetting your washing machine. A software problem, power surge, or other type of temporary glitch can cause your washing machine to display a random error code without an underlying issue. To reset:
- Unplug your Samsung washer or switch off the corresponding circuit breaker.
- Wait five minutes to allow the electronics to reset fully.
- Restore power to your washer, and check to see if the error code has cleared.
- Run a short test cycle and watch for the error code to recur during the filling part of the cycle. If it doesn’t, you can continue using your Samsung washer as normal. If it does, proceed to the next fix in our guide.
Check your home’s water supply
If your home’s water supply is having issues, your Samsung washer won’t be able to fill with water, which can trigger the 4C error code. Make sure there are no underlying plumbing issues by turning on a faucet in your house and making sure everything looks normal. You may also want to check the water pressure, as low pressure can stop your washing machine from working. To check this:
- Source a pressure tester. You can purchase these from a hardware store or hire one if you prefer.
- Turn off all the faucets in your home.
- Fix the pressure gauge to an outside faucet.
- Ensure the faucet is turned fully on.
- Read the gauge. Most homes have water pressure between 40 and 60 PSI (pounds per square inch). If your reading is under 30 PSI, you have a problem and need to have a plumber check your pressure.
Check the water supply hoses
If you’ve determined your water pressure is fine, the next step is to check if the inlet hoses are functioning correctly. If the hoses are blocked, kinked, or not turned on properly, your Samsung washer won’t fill with water, triggering the 4C error code. Here’s how to check:
- First, turn off the power and move your washing machine away from the wall so you can easily access the faucets and hoses.
- Ensure that both hot and cold water faucets joined to the inlet hoses are completely turned on. If either is off or partially off, the water supply will be insufficient.
- Ensure that the correct hose is joined to the correct faucet. Switching the cold and hot water hoses can cause issues, particularly if the hot water pressure is significantly lower than the cold water pressure.
- Thoroughly inspect the hoses for kinks or bends. If they are kinked, ensure they are as straight as possible. If necessary, use zip ties to hold them in place.
- Check for leaks in the hoses. If you notice loose connections, tighten them. If you notice a leak in the hose itself, the hoses will need to be replaced.
- To check for blockages in the hoses themselves, turn off the water supply and disconnect the hoses. Make sure you have an old towel on hand to catch any residual water.
- Run water through the hoses to check for blockages. If the hoses appear to be blocked, use a length of wire to clear out any debris.
- Once the hoses are clean, reconnect them to your washer and run a test cycle to see if the error code has cleared.
Check water inlet screens
Your water inlet hoses come with screens, also known as mesh filters. These help prevent debris and mineral buildup from blocking the hoses. Over time, the screens can become blocked, which can lead to the 4C error code. To access and clean the filters:
- Cut power to your washer and turn off the water inlet faucets.
- Disconnect the hoses from the washing machine.
- Remove the filters from both the hot and cold water inlet hose. They are located where the hose attaches to the washing machine, in the L-shaped arm that connects the hoses to the washer. Consult your manual if you’re having trouble finding them.
- Check the filters for dirt or mineral buildup.
- Thoroughly clean the filters. If they have heavy mineral buildup, try soaking them in white vinegar for half an hour before cleaning.
- Once clean, put the filters back in place and reconnect the hoses. Make sure the connections are firm and watertight to avoid leaks.
- Restore your washer’s power and water supply, then run a test cycle to check if the error code has gone.
Check the dispenser drawer
If you still haven’t solved your 4C error code, you might be experiencing a rare fault in which a blocked detergent tray is obstructing water flow. This can happen if too much powder detergent is used and is allowed to dry, solidifying and forming a blockage.
- Open and fully remove the detergent drawer.
- Check for any detergent buildup in the drawer and drawer housing.
- Thoroughly clean any blockages. You may need to use something hard to chip dried detergent away.
- Once clean, replace the drawer and run a test cycle to ensure the error code has gone.

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