The 4E error means water supply not detected — the machine didn't fill within the expected time. It may also appear as 4C on some models.
The Samsung washer displays the 4E error and halts the current cycle until the underlying problem is fixed.
Check these in order. The first cause accounts for the majority of 4E errors.
The most common cause. Check behind the machine — a hose pinched against the wall restricts flow enough to trigger 4E within 3–5 minutes.
Fine mesh screens inside the water inlet valve trap sediment over time. Partially blocked screens reduce flow rate below the sensor threshold.
If the hot or cold shutoff valve at the wall is only partially open, the flow rate is too low and the machine times out waiting to fill.
If hoses and screens are clear and valves are open, the inlet valve solenoid itself may have failed. Test by checking for 120V at the valve during fill — if voltage is present but no water flows, replace the valve.
Follow these in order. Stop as soon as the error clears.
Cut power before touching any components. Wait 60 seconds.
Pull the machine slightly forward and inspect both hoses for kinks or tight bends. Straighten any you find.
Disconnect the supply hoses at the back of the machine. Use needle-nose pliers to carefully remove the mesh screens from the valve inlets. Rinse under running water to clear sediment. Reinsert screens and reconnect hoses.
At the wall, turn both the hot and cold shutoff valves counterclockwise as far as they go. A valve that's only half-open will restrict flow.
Restore power and run a Rinse+Spin cycle. Watch for the drum to fill. If 4E returns with all of the above checked, the inlet valve itself likely needs replacement.
For warranty service, contact Samsung support ↗ or a certified appliance technician.