Samsung Washer Error Codes: Several of Them Are Not Faults

Samsung publishes codes that are not faults, and says so in writing. That is the single most useful thing about their list, because the codes look identical to real errors on the display.

Three of them carry an explicit note:

[Suds] This code does not indicate that service is needed. It is caused by an incorrect use of detergent.

[4C2] This code does not indicate that service is needed.

[Ur] A Ur code does not mean that there is an issue with your washer, it’s just there to tell you what’s happening.

And three more are status messages rather than errors at all — a firmware download, calibration mode, and child lock.

So before troubleshooting anything, check whether your machine is reporting a problem or narrating.

The codes that are the machine talking

dn — downloading an update. Samsung: “The washer is downloading an update. Updates take about 15 minutes. Keep the washer powered on while the download completes.” A machine that appears frozen is updating itself.

Cb or C6 — calibration mode. Used to recalibrate weight detection, and Samsung notes it “will not calibrate correctly unless the washing machine is empty.”

CL — child lock. Displayed when child lock mode has drained water from the tub.

Ur — unbalanced load retry. The washer is adding water, rebalancing and trying the spin again. It is describing its own recovery.

None of these needs anything from you except, in the case of dn, leaving it alone for a quarter of an hour.

4C2: your hoses are crossed

This is the best code Samsung publishes, because it diagnoses an installation error most people would never find.

The water from the cold water supply is extremely hot.

Supply hoses are swapped and cold is connected to hot while hot is connected to cold.

The machine noticed that the pipe labelled cold is delivering hot water and worked out why. The fix is to swap them back — blue to blue, red to red.

When this happens: immediately after delivery, after a move, or after a plumber worked under the sink. If your washer is new and everything is coming out too hot, or colours are fading unexpectedly, this is worth checking before you blame the machine.

Samsung’s note that it needs no service is the important part. Nothing has failed.

The suds code, and the honest cause

The washer has detected an over-sudsing condition and will stop for a short period to allow the suds to dissipate.

Followed by:

This code does not indicate that service is needed. It is caused by an incorrect use of detergent.

That is unusually blunt for a manufacturer, and it is correct. The full picture — including why a capful of 8x concentrate is four times a capful of 2x, and why “no splash” bleach causes it — is in the washer SUD error.

Related and easy to miss: SDC means the detergent drawer is not fully closed, and Samsung notes “the detergent drawer will click when it is completely closed.” Listen for the click.

The groups that are real faults

Water not entering — 4C, nF, 4E. “Water is not entering the washer correctly.” Supply hoses, valves, kinks, filters. Covered in detail for the 4C code.

Not draining — nd, 5E, 5C, SE, SC. “Water is not draining from the washer at the correct speed (or at all).” The general diagnosis, which is installation about half the time, is in a washing machine that will not drain.

Too much water — OE, OC. “There is too much water in the washer.” Often the other side of a drain problem: a machine that siphons refills itself.

Leak or level — 1E, LE, LC. “Moisture is detected somewhere it doesn’t belong, or there is an issue with the sensor itself.” Note the second half — Samsung allows that the sensor may be at fault rather than the plumbing, which is the same framing as their dishwasher LC code.

Door — dE, dC, FL, dL and others. “The door is not detected as closed and locked.” Check the latch and for laundry caught in it.

Jammed button — E2, bE2, 6E2. A button detected as stuck. Samsung’s fix is specific: “individually touch every button on the panel. While touching each button, work it back and forth to reach all edges before releasing.” Pressing the middle of a button proves nothing, because a membrane can be held down at one corner.

Voltage — 9C1, 9C2, PF, 2E, 9E1, UC. “There is an irregularity in the electrical current being supplied to the washer.” Dedicated circuit, no extension cord. PF specifically means the power went out before the washer powered itself off.

Where the manufacturers disagree, and it matters

While checking the 4C guidance we found something worth flagging, because it affects a number this site has already published.

Samsung’s page gives two different figures for how far the drain hose should go into the drain pipe, in two different sections:

It should not be inserted less than 6 inches or more than 8 inches into the drain pipe.

It should not be inserted more than 6 inches into the drain pipe.

And Whirlpool publishes, for its own machines, that the hose must not extend more than 4.5 inches (113 mm) — a figure we quote in a washing machine that will not drain.

Three numbers. Two of them from the same manufacturer on the same page.

We are not going to resolve that for you, because we cannot: they are different machines with different pump characteristics, and picking one would mean inventing a specification. What we can say is what follows from the disagreement — use the installation manual for your specific model, and treat any single figure quoted online, including ours, as belonging to the machine it was published for.

The underlying physics is agreed even where the numbers are not: too shallow and the hose works loose; too deep and drained water siphons back into the drum.

One more from the same section, easy to undo by accident:

Do not remove the screw on the back of the washer that holds the drain hose against the washer. If the screw has been removed, screw it and the holder back in with any screw that fits. If the holder is missing, service is required.

The codes that are not faults, and the rest

A suds, Ur, 4C2, dn, Cb or CL code. Not a fault. Samsung says so, and the fix is detergent, patience or a hose swap.

A door code. Look for laundry caught in the seal before assuming a switch.

A jammed button. Free, and invisible unless you work every edge.

A voltage code. Dedicated circuit, no extension cord — and an electrician if it repeats.

Fill, drain or leak codes. These are the real ones, and about half of them turn out to be installation rather than failure.

Anything else. Samsung’s general step is to power off for two to three minutes, power on and restart the cycle. If it returns, note the code exactly as displayed — the same fault appears as several different code strings across model years, and a mis-transcribed code sends you to the wrong page.