Samsung Dishwasher 4C Error Code: Causes & Fix

What is the Samsung Dishwasher 4C error?#

A 4C code means your Samsung dishwasher tried to fill but water is not entering — a supply problem. The machine expected water within a set window, did not get it, and flagged 4C at the start of the cycle. The usual reasons are ordinary: the supply valve under the sink is partly closed, the inlet screen is clogged, or the fill line is kinked or corroded. It will not harm the machine, just stop it. Before assuming a part failed, check that the water shutoff under the sink is fully open.

4C on a Samsung Dishwasher: likely causes and repair cost#

On a Samsung Dishwasher, the 4C code signals: water supply error.

Typical professional repair: $100–$225 · Difficulty: moderate · often owner-fixable

Fastest thing to try first: Check water supply valve is open.

Symptoms that often accompany 4C: Dishwasher starts but no water enters; Very slow fill times; Error appears at the beginning of the cycle

Technician diagnostic sequence for 4C:

1. Check that the water supply valve under the kitchen sink is fully open. The dishwasher supply valve is typically the one closest to the dishwasher (left side under the sink)
2. Check the water inlet hose for kinks. Pull the dishwasher out slightly (disconnect power first) and inspect the supply line connection at the back
3. Inspect the water inlet valve filter screen — disconnect the supply line at the dishwasher inlet valve and check the small mesh screen inside for mineral buildup. Clean with vinegar and a toothbrush
4. Test the inlet valve electrically: with the machine running a fill cycle, check for 120V AC at the valve terminals. If voltage is present but no water flows, the valve is stuck closed and needs replacement

Parts a technician may check or replace: Samsung DD62-00067A; Inlet screen/filter if missing or damaged; Water supply line if corroded or kinked

Field note: Samsung dishwasher 4C codes in homes with hard water (common in Sacramento) are usually caused by a calcified inlet valve screen. Soaking the screen in CLR or white vinegar for 30 minutes dissolves the buildup and restores flow without replacing anything.

How to troubleshoot the 4C error yourself#

4C is often fixable without a service call. Under the sink, confirm the dishwasher's supply valve is fully open, then check the fill line for a kink or a crushed section. Where the fill line meets the dishwasher's inlet valve there is usually a small screen that catches sediment — a clogged inlet screen is a listed cause in the table above, and cleaning it restores flow. Verify household water pressure is normal by running the sink tap. Reconnect and restart. If water still will not enter with the valve open, a clean screen, and a good line, the inlet valve itself may have failed — a "moderate" repair from the table above best left to a technician, since it means working at the water connection.

Is the Samsung Dishwasher 4C error worth fixing?#

4C rarely turns into a large bill, which makes it worth resolving. Opening the supply valve or cleaning the inlet screen is free, and even when the inlet valve needs replacing the table above lists $100 to $225 — the low end for a dishwasher. Against a new machine that is minor, so there is no real replace debate: clear the supply issue yourself, and if the valve is genuinely gone, the $100 to $225 fix is easily worth it on any dishwasher worth keeping.

Samsung Dishwasher 4C: frequently asked questions#

What does the 4C error mean on a Samsung Dishwasher?#

It means water is not entering the dishwasher within the expected time. Usually a closed supply valve, clogged inlet screen, or kinked line is to blame.

Is it safe to keep using a Samsung Dishwasher that shows the 4C error?#

Yes — it simply will not run without water, and there is no hazard. You can troubleshoot the supply at your own pace.

Can I clear the 4C error myself, or do I need a technician?#

Often yes: open the supply valve fully, clean the inlet screen, and straighten the fill line. Only a failed inlet valve requires a technician.

How much does it cost to repair the 4C error on a Samsung Dishwasher?#

Frequently nothing if it is a supply restriction. If the inlet valve has failed, the table above lists $100 to $225.

Which parts usually fail when a dishwasher throws the 4C code?#

Often none — it is a closed valve or clogged screen. When a part fails, it is the water inlet valve from the table above.

Why does a closed water supply trigger the 4C error?#

The dishwasher times how long filling takes; if the valve is closed or flow is restricted, water never reaches the target level in time, so it reports 4C.