Direct answer: A Samsung dishwasher 4C or 4E code usually means the machine is not getting enough water during the fill portion of the cycle. Most of the time the cause is a closed or restricted water supply, a kinked inlet hose, or debris at the dishwasher water inlet valve screen.
Most likely: Start with the shutoff valve under the sink, then check the dishwasher water supply hose for kinks and the inlet connection for sediment. If water supply is good and the tub still stays mostly dry, the dishwasher water inlet valve or dishwasher float assembly becomes more likely.
This one is usually more straightforward than it looks. If the dishwasher starts, hums, or drains briefly and then throws 4C or 4E, focus on whether water is actually entering the tub. Reality check: a half-closed sink shutoff valve causes this more often than homeowners expect. Common wrong move: replacing the drain pump because the machine sounds busy even though the real problem is no incoming water.
Don’t start with: Do not start by ordering a control board or tearing the door apart. This code is usually a basic water-supply problem, not an electronics problem.
You hear the dishwasher start, maybe drain briefly, then it stops and shows 4C or 4E before much water enters.
Start here: Check that the water shutoff valve is fully open and the dishwasher supply hose is not kinked behind the machine.
The cycle begins, but when you open the door there is little or no water pooled in the sump area.
Start here: Focus on incoming water: supply valve, hose restriction, and debris at the dishwasher water inlet valve screen.
The dishwasher gets a weak trickle or partial fill, then stops with the error.
Start here: Look for low flow from a partly closed shutoff valve, a pinched hose, or sediment clogging the inlet screen.
The dishwasher worked before, then failed after sink work, flooring, cabinet work, or pulling the unit out.
Start here: Recheck the under-sink shutoff, hose routing, and whether the supply line was twisted or crushed during reinstall.
This is the most common real-world cause, especially after sink repairs, cleaning under the sink, or moving stored items around the valve.
Quick check: Turn the dishwasher off, find the hot-water shutoff feeding the dishwasher, and make sure it is fully open, not just cracked open.
A dishwasher can throw 4C or 4E when the valve is open but flow is too weak because the hose is pinched behind the unit or bent sharply under the sink.
Quick check: Inspect the full visible hose path for a flattened spot, hard bend, or twist, especially where it passes through the cabinet.
Sediment from plumbing work or older supply lines can clog the small screen where water enters the dishwasher, causing a weak fill or no fill.
Quick check: If you can safely shut off water and disconnect the inlet line, inspect the valve inlet screen for grit or mineral debris.
If supply is strong and unobstructed but the tub still does not fill, the dishwasher may be falsely reading full or the inlet valve may not be opening properly.
Quick check: Listen at startup: if you hear no clear water-entry sound and the tub stays dry after supply checks, the float or inlet valve moves up the list.
4C and 4E point to incoming water trouble, so first confirm the tub is not actually filling and then draining for some other reason.
Next move: You confirmed the dishwasher is not filling properly, so stay on the water-supply path. If you find normal water level in the tub, the code may be secondary to another problem and this page is no longer the best fit.
What to conclude: A dry or nearly dry tub tells you the dishwasher is not getting enough incoming water soon enough.
A closed or half-open shutoff valve is the fastest, safest fix and the most common one in the field.
Next move: If the dishwasher now fills and the code clears, the problem was low or blocked supply at the shutoff or line path. If the valve is fully open and the dishwasher still does not fill, move to the hose and inlet connection.
What to conclude: You ruled out the easiest supply-side cause before touching the appliance.
A pinched line can reduce flow enough to trigger 4C or 4E even when the shutoff valve is open.
Next move: If the dishwasher fills normally after rerouting the hose, the restriction was the cause. If the hose path looks good and flow is still weak or absent, check the inlet connection for sediment.
After plumbing work or in older homes, grit can clog the small inlet screen and starve the dishwasher for water.
Next move: If fill returns and the code stays gone, the restriction was sediment at the inlet. If the screen is clear and supply to the dishwasher is strong but the tub still stays dry, the remaining likely causes are the dishwasher float assembly or dishwasher water inlet valve.
Once supply, hose routing, and inlet blockage are ruled out, the likely fix is inside the dishwasher fill system.
A good result: If freeing the float restores normal filling, you found the fault without replacing unnecessary parts.
If not: If the float is free and the dishwasher still will not fill, the dishwasher water inlet valve is the strongest remaining DIY part-failure suspect.
What to conclude: At this point you have narrowed the problem to the dishwasher's own fill controls rather than the house plumbing.
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It usually means the dishwasher is not filling with water fast enough, or at all. The most common causes are a closed shutoff valve, a kinked supply hose, or debris at the dishwasher water inlet connection.
Yes. If the dishwasher gets only a weak trickle, it may time out and show the code. A partly closed shutoff valve or restricted hose is more common than a true whole-house pressure problem.
No. Check the shutoff valve, hose routing, and inlet screen first. The inlet valve becomes a stronger suspect only after you know the dishwasher is getting proper water supply to the machine.
You can retry after correcting a simple supply issue, but do not keep forcing cycles if the tub stays dry. Repeated attempts will not clear a blocked line or failed fill component.
That is a common clue. The shutoff valve may have been left partly closed, sediment may have been stirred up into the inlet screen, or the supply hose may have been twisted or pinched when the dishwasher was pushed back in.
Usually no. This code points to incoming water, not water leaving the machine. If the tub fills normally and then drains out or leaves standing water later, you are likely dealing with a different dishwasher problem.