Water Supply Error (Water Not Filling)

What it means

This code appears on Samsung front-load and top-load washing machines when the water level in the tub does not reach the required point within the set time; older models show the same fault as 4E. The washer stops the cycle until the problem is solved, and the cause is usually simple, such as a closed tap, a kinked hose or a blocked inlet screen. The same code can mean something else on other brands.

Models covered: Samsung front-load and top-load washing machines; newer models show codes ending in C (e.g. 4C), older ones end in E (e.g. 4E) with the same meaning.

Related codes: 5C1COCLC

Symptoms4

• The washer stops early in the cycle and shows 4C after a few minutes.
• No sound of water flowing into the tub, or only a weak trickle.
• Detergent stays in the drawer because no water has passed through it.
• The washer may work on some days and fail on others when building water pressure is low.

Possible causes7

• Water tap fully or partly closed, or no water supply to the home.
• Inlet hose kinked or crushed behind the washer.
• Small mesh screen at the end of the inlet hose blocked with sediment or sand.
• Low water pressure from the tank or supply, especially on upper floors.
• Damaged or collapsed inlet hose.
• Faulty water inlet valve or a weak valve coil.
• Water level (pressure) sensor or main board fault (less common).

How to diagnose6

1. Unplug the washer, then make sure the tap is fully open and that water reaches another tap in the home.
2. Check the full length of the inlet hose for kinks or crushing between the washer and the wall.
3. Close the tap, disconnect the inlet hose from the washer and rinse the mesh screen at its end under running water without forcing it out.
4. Open the tap with the hose disconnected into a bucket to judge the water flow.
5. If flow is strong and the code returns, a technician unplugs the washer before opening it, then checks the inlet valve and its wiring against the manufacturer specification.
6. If the valve is good, the technician checks the pressure sensor hose and the main board.

How to fix6

1. Open the tap fully and remove any kink in the inlet hose.
2. Clean the mesh screen at the end of the inlet hose and refit it firmly.
3. Replace the inlet hose if it is cracked or collapsed inside.
4. Fix low household water pressure if present (tank or booster pump).
5. Replace the water inlet valve if it is confirmed faulty.
6. Run a short cycle and confirm water fills at normal speed and the code does not return.

The cost is close to nothing when the tap, hose or screen is to blame, and reaches the high end when the water inlet valve must be replaced with a technician visit.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions