What Does Error Code 4E Mean on a Samsung Washing Machine?
Check that both hot and cold water faucets behind the machine are fully open, then inspect the inlet hoses for kinks or blockages and straighten or clear them as needed — the machine should fill normally on the next cycle (takes about 5 minutes).
Fault description
Error code 4E means your Samsung washing machine started a cycle but failed to detect water entering the drum within the expected time. The machine monitors water intake through a pressure sensor, and when that sensor does not register a rise in water level, it stops the cycle and displays 4E to protect the drum and motor from running dry.
When this error appears, the machine will typically pause mid-fill or at the very start of a cycle. You may hear the inlet valve clicking or buzzing briefly before the display shows the fault. The drum will remain empty or only partially filled.
In the majority of cases, the cause is something straightforward — a closed tap, a kinked hose, or a clogged inlet filter — and you can resolve it without any tools or specialist knowledge. This guide walks you through every likely cause and how to address each one.
Causes
- Water faucet not fully open — If either the hot or cold water supply tap behind the machine is partially or fully closed, the machine cannot draw enough water to trigger the pressure sensor. This is the single most common reason for a 4E error and takes seconds to check.
- Kinked or blocked inlet hose — The rubber hoses connecting the machine to the water supply can become kinked if the machine has been pushed too close to the wall, or blocked internally with sediment over time. A restricted hose dramatically reduces water flow even when the tap is fully open.
- Clogged inlet filter mesh — At the point where each inlet hose connects to the back of the machine, there is a small mesh filter designed to catch debris from the water supply. These filters can become blocked with limescale or grit, reducing flow to a trickle.
- Flood-safe hose activated or faulty — Some Samsung models are supplied with flood-safe hoses that contain an internal shut-off mechanism. If the machine has experienced a sudden pressure change or the hose has aged, this mechanism can trigger and cut off the water supply entirely.
- Faulty water inlet valve — The inlet valve is the electrically operated component that opens to allow water into the drum. If the valve solenoid has failed or the valve body is blocked, water will not enter even when the supply is fully open and the hoses are clear.
- Faulty pressure sensor or wiring — In less common cases, the water level pressure sensor itself may be defective, or the wiring connecting it to the control board may be damaged. The machine may actually be filling correctly but still display 4E because it cannot detect the water level rising.
Step-by-Step Fix
- 1
Check the water supply taps
Locate the hot and cold water taps on the wall behind the washing machine. Turn each one fully anticlockwise to make sure they are completely open. It is surprisingly easy for these taps to be knocked partially closed when moving the machine or accessing the area behind it.
- 2
Inspect the inlet hoses for kinks
Pull the machine gently away from the wall and examine both inlet hoses along their full length. If you find a kink, straighten the hose carefully and reposition the machine so there is at least 10 cm of clearance at the back to prevent the hose from bending again.
- 3
Clean the inlet filter meshes
Turn off both water supply taps, then unscrew the inlet hoses from the back of the machine — have a towel ready as some water will spill. At each connection point on the machine, you will see a small plastic mesh filter. Use a pair of needle-nose pliers to pull the filter out, rinse it under a tap, and use an old toothbrush to remove any limescale or grit. Refit the filters, reconnect the hoses, and tighten them firmly by hand.
- 4
Check and replace flood-safe hoses if fitted
If your machine came with flood-safe hoses — identifiable by a thicker plastic casing around the hose body — try temporarily replacing them with standard inlet hoses to test whether the flood-safe mechanism has triggered. If the error clears with standard hoses, the flood-safe hose needs to be replaced.
- 5
Run a test cycle and reset the error
Once you have completed the checks above, turn the water supply back on, select a short wash cycle such as a quick 30-minute programme, and start the machine. Watch the first few minutes to confirm water is entering the drum. If the machine fills normally, the fault is resolved.
- 6
Inspect the inlet valve for faults
If the machine still shows 4E after the steps above, the inlet valve may be at fault. With the machine unplugged, remove the back panel and locate the valve where the hoses connect internally. Check that the wiring connectors are firmly seated on the valve solenoids. If the valve body appears corroded, cracked, or the solenoid does not click when power is briefly applied, the valve needs to be replaced.
- 7
Check the pressure sensor and its hose
The pressure sensor is usually located inside the top panel of the machine and is connected to the drum by a thin rubber or plastic tube. Check that this tube is not cracked, disconnected, or blocked with residue. A blocked pressure sensor tube can prevent the sensor from reading the water level correctly, causing a false 4E error even when water is present.
Affected models
Select your model to see its full troubleshooting page.
When to call a service technician
If you have worked through all the steps above — confirmed the taps are open, cleaned the filters, straightened the hoses, and checked the inlet valve connections — and the machine still displays 4E, the fault is likely internal. A failed inlet valve solenoid, a defective pressure sensor, or a wiring fault between these components and the main control board all require proper diagnosis with a multimeter and access to internal components.
You should also call a service technician if you notice water leaking from the inlet valve area, if the machine is still under warranty, or if you are not comfortable removing the back panel of the appliance. Attempting repairs on live electrical components without experience carries a real risk of injury or further damage to the machine.
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Frequently Asked Questions
Can I still use my washing machine while it shows error code 4E?
No. When 4E is displayed, the machine has stopped the cycle because it cannot confirm water is entering the drum. Running the motor without water present can cause damage to the drum bearings and heating element. Resolve the fault before starting another cycle.
Why does my Samsung washer show 4E only sometimes and not every wash?
An intermittent 4E error often points to a partially blocked inlet filter or a flood-safe hose that is beginning to fail. Low water pressure from the mains supply at peak usage times can also trigger the error occasionally. Cleaning the inlet filters is the best first step for an intermittent fault.
How do I clear the 4E error code after fixing the problem?
On most Samsung washing machines, the error will clear automatically once the underlying fault is resolved and you start a new cycle. If the code persists after the fix, try pressing and holding the Start/Pause button for five seconds, or switch the machine off at the wall for one minute and then back on.
Is error code 4E the same as error code E4 on Samsung washers?
Yes, on many Samsung models these two codes refer to the same water supply fault. The display format can vary depending on the model and the age of the control board software, but the diagnosis and repair steps are identical for both.
How much does it cost to replace a Samsung washing machine inlet valve?
A replacement inlet valve for a Samsung washing machine typically costs between £20 and £50 for the part, depending on the model. If you are fitting it yourself, that is the total cost. A service technician call-out to supply and fit the valve will usually add a labour charge on top of the part price.