Samsung Washer Not Filling With Water: 4C Error, Valve
Quick Answer
Samsung washer not filling displays 4C (or 4E on some models) error code. 4C means no water detected during the fill phase. Check both supply valves behind the washer. Samsung-specific: Active WaterJet models have a built-in faucet on the lid that uses the same water supply - if this faucet was left on, it may have reduced water pressure to the fill valve.
When a Samsung washer stops filling, I usually find it's not a broken part but a simple blockage. Hard water minerals love to settle in those tiny mesh filters where your hoses connect. If those are clear, check the pressure sensor tube. On Samsung front-loaders, gunk builds up in that tube and tricks the machine into thinking it's already full when it's bone dry.
Samsung Washer Not Filling With Water: 4C Error, Valve
Seeing a 4C or 4E code can be frustrating, but it's often a 15-minute fix. Before you assume the inlet valve is dead, check your home water pressure and look for kinked hoses. Honestly, most Samsung fill issues are either outside the machine entirely or caused by a clogged filter screen that costs nothing to clean.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Supply valves not open30%
Inlet screens mineral-clogged20%
Inlet valve solenoid failed15%
Pressure switch hose kinked15%
Sensor not detecting level10%
Board not sending fill signal10%
Symptoms You May Notice
The washer starts a cycle, fills partway, then just stops and sits there humming for a few minutes before throwing 4C.
Display shows 4C or 4E the second a cycle starts, drum stays completely dry the whole time.
Water trickles in way slower than it should, and the machine eventually gives up and errors out before hitting the fill level.
You hear clicking or buzzing from the back of the machine during the fill phase but no water actually makes it in.
Machine worked fine yesterday but after a power outage or a water shutoff in the neighborhood, now it won't fill at all.
Can you reset a Samsung washer to clear the NOT-FILLING code?
After fixing the water supply issue, unplug the washer completely from the wall outlet. Don't just hit the power button, that won't fully clear the control board. Wait a full 60 seconds, then plug it back in. Press Power, select Rinse+Spin, and hit Start. Watch for water to begin entering the tub within the first 30 seconds. If it does, you're good. If 4C comes right back, run through the diagnostic steps again.
Tools Required for Diagnosis
Phillips #2 screwdriverNeedle-nose pliersDigital multimeterBucket (1 gallon or larger)White vinegarOld toothbrushFlashlight or headlamp
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range500–1500 ohms
ConditionIf Open (OL) or infinite, replace component.
Frequently Asked Questions
What does the 4C error code actually mean on a Samsung washer?
4C means the washer didn't detect water entering the tub during the fill phase. The control board gives the fill valve a set amount of time to get water in, and when the pressure sensor doesn't trip in that window, it throws 4C and stops everything. On older Samsung models you might see 4E instead, but it's the exact same error. The fix is usually external to the machine, either a supply valve, a kinked hose, or those clogged mesh inlet screens.
How much does it cost to fix a Samsung washer that won't fill?
If it's just clogged inlet screens, the fix is free. Seriously, vinegar and 20 minutes. If the inlet valve is burned out, the part runs $60 to $90 and you can do it yourself. Calling a tech will run you $250 to $450 total including the service call and labor. The pressure sensor hose is the cheapest part swap at around $8 to $15. The only expensive scenario is a control board failure, which can run $200 to $300 for the part alone, and at that point you should think hard about the machine's age.
Can I fix this myself?
Yeah, pretty much all of it. Checking the supply valves and cleaning the screens needs zero tools. Replacing the inlet valve just takes a Phillips #2 screwdriver and needle-nose pliers. Swapping the pressure hose is maybe 15 minutes once the top panel's off. The only step that needs a little confidence is the multimeter test on the valve coils. If you've never used a multimeter before, watch a basic ohms test video first. It's genuinely not complicated, just measure resistance across two terminals.
Is it worth fixing a Samsung washer that won't fill?
If your machine's under 8 to 10 years old, almost always yes. An inlet valve or a pressure hose is a minor repair, and Samsung front-loaders are built on a pretty modular platform with parts that are still widely available and reasonably priced. The only times I tell people to skip the repair is if the control board has fried, the tub bearings are shot, or the drum spider has cracked. A fill issue doesn't put you anywhere near that territory.
Why did my Samsung suddenly stop filling when it worked fine yesterday?
Most of the time something changed in your water supply, not the washer itself. A neighborhood water shutoff can knock debris into your lines and clog the inlet screens. A power outage sometimes causes the control board to lock up on a 4C. If you've got an Active WaterJet model, check that lid faucet first because it's usually the answer. And honestly, check whether someone moved the washer and accidentally closed one of the supply valves. That's the answer way more often than people expect.
What's the difference between 4C and 4E on Samsung washers?
Same error, different display format. Older Samsung models showed it as 4E. Newer ones show 4C. Both mean no water detected during the fill phase. The diagnostic steps and fixes are completely identical regardless of which code your display shows. So if you're reading a repair guide for 4C and your machine shows 4E, or vice versa, don't worry about it. You're looking at the same root cause and the same set of fixes.
Same Fix Works on These Brands
Samsung shares the same hardware platform with these brands. The diagnosis and repair steps are identical.