Samsung Washer Error Code 4C: Water Supply / Not Filling (Meaning, Causes, Fixes)
What the code means
Samsung support lists 4C, 1 4C, nF and 4E together as a 'Not filling' error: water is not entering the washer correctly. The most common cause is a blocked, kinked or closed water supply. Samsung's European pages specify the supply must be 0.5–8 bar (about 7–116 psi) and deliver at least 4 litres per minute. Samsung's Smart Install self-diagnostic also reports 4C when the bleach, cold or hot water valve check fails to bring in water.
Likely causes
- Water supply tap/valve not fully open (Samsung says both valves must be fully open and stay open while the washer runs)
- Inlet hose kinked, bent, damaged, or hot/cold hoses connected to the wrong inlets — or the hot line not connected at all (some 'Cold' cycles still call for hot water)
- Clogged mesh inlet filters where the hoses connect to the washer (sediment/debris)
- Low household water pressure or flow (below 0.5 bar / 4 L per minute), or a frozen or burst supply pipe
- 'Flood Safe' style hoses, which Samsung says not to use with these washers
- Blocked detergent dispenser drawer (front loaders)
- Drain hose installed incorrectly (wrong height or inserted too far into the standpipe), causing siphoning
- Faulty water inlet valve (solenoid not opening) — the most likely failed part once supply issues are ruled out
- Less commonly, a control board glitch or fault
Safe DIY checks
Unplug the appliance (or switch off its breaker) and shut off the water supply valves before removing panels or disconnecting hoses. Keep towels handy for residual water.
- Open both the hot and cold supply valves fully, and leave them open while the washer runs.
- Pull the washer forward and check both inlet hoses for kinks, bends or damage. Confirm hot goes to hot and cold goes to cold, and that the hot hose is connected.
- Unplug the washer (or flip its breaker) for 1 minute, then restore power and try a cycle. Sometimes this clears a glitch.
- Clean the inlet filters: turn the water valves OFF, put a towel down, unscrew the hoses from the back of the washer, gently pull out the mesh filters (pliers help), rinse them clean, put them back, reconnect, open the valves and check for leaks. Samsung suggests doing this at least twice a year.
- Front loaders: take out the detergent dispenser drawer, clear any blockage and put it back.
- Check the drain hose: it should not be kinked, and on US models it should go 6–8 inches into the standpipe. Don't remove the screw that holds the drain hose against the back of the washer.
- Check the water flow at the tap: weak flow anywhere in the house points to a plumbing/supply problem, not the washer.
- If 4C keeps coming back after all of these, stop and arrange service.
🛠 When to call a pro
- The code keeps coming back even though the water supply, hoses and filters are fine. Next you'd need live voltage checks on the inlet valve (120 VAC). Leave that to a technician if you aren't trained to test live circuits.
- The water inlet valve or the control board needs replacing and you aren't comfortable removing panels and handling wiring.
- A supply pipe is frozen or burst, or water pressure is low throughout the home. Call a plumber.
- The drain hose holder screw on the back is missing, which Samsung says needs service.
- The washer is under warranty. Request service from Samsung instead of opening it up yourself.
Parts that commonly fix it
Always match the part number to your exact model.
Water inlet valve (exact OEM part number for your model)
Match your washer's model number; part numbers vary by model (e.g. DC62-00214K fits some front loaders such as WF45R6100AW/WF45T6000AW). Check the fit before ordering.
[affiliate link slot: AFFILIATE_SLOT_INLET_VALVE]Washer inlet (fill) hoses, standard pair
Replace any that are kinked, cracked or bulging. Samsung advises against Flood Safe hoses.
[affiliate link slot: AFFILIATE_SLOT_FILL_HOSES]Inlet hose mesh filter screens
Cheap replacements if the originals are torn or can't be cleaned.
[affiliate link slot: AFFILIATE_SLOT_INLET_SCREENS]Main control board
Only as a last resort, after the supply, filters and inlet valve check out. Usually a job for a pro.
[affiliate link slot: AFFILIATE_SLOT_BOARD]Sources
- Samsung US — Washing machine information and error codes (4C, 1 4C, nF, 4E: Not filling error; troubleshooting steps)
- Samsung UK — How to resolve a 4E or 4C error code (water supply; 0.5–8 bar; mesh filter and dispenser drawer cleaning)
- Samsung Ireland — What do the codes on my washing machine mean? (4C/4E water supply; at least 4 L/min)
- Samsung US — Run diagnostics (Smart Install): 4C shown when the bleach/cold/hot valve check fails
- PartSelect — How to fix Samsung washer 4C/4E error (inlet valve as the most likely failed part; continuity test)
Last reviewed 2026-10-21. Always confirm against the manual for your exact model number.