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Error Code Guide

Samsung washing machine error codes

Samsung changed how it labels faults partway through, so the same problem reads as 4E on an older machine and 4C on a newer one. Display width changes it again: a narrow display shows 5C where a wider one shows 1 5C, and the letter S is drawn as a 5, which is why SUD appears as 5UD. Every spelling of a code is listed on its page, so search for what your machine actually shows.

10codes confirmed

Stop the machine if you see these

LC, OC mean water or electrical trouble rather than a blockage. Turn the tap off, unplug the machine and read the page before running another cycle.

All 10 codes

CodeWhat it means

5C

Will not run		The water is not leaving the machine, or it is leaving far too slowly.5E SC SE

4C

Will not run		Water is not arriving in the machine the way it should.4E nF 1 4C

dC

Will not run		The lock has not engaged, so as far as the machine is concerned the door is still open.dE dE1 dE2

Ub

Safe to use		The washing has ended up lopsided in the drum, and the machine will not take it up to spin speed like that.UE U6 Ur

LC

Stop now		Water has been detected where it should not be, or the sensor that watches for it has failed.1C 1E LE

OC

Stop now		There is more water in the tub than there should be.OE 0C 0E

4C2

Safe to use		The cold inlet is being fed hot water, which almost always means the hoses are on the wrong way round.4E2 nF1 CE

SUD

Safe to use		Foam has built up faster than the machine can clear it, so the cycle has stopped part way through.5UD Sd 5d

E2

Will not run		A button on the panel is being read as held down, so the machine will not accept anything else.bE2 6E2 8E2

9C1

Will not run		The electricity reaching the machine is outside the range it will run on.9C2 UC 9E1

Things that look like faults but are not

These stop people mid-wash and send them looking for a repair. None of them needs one.

CL

Child lock is switched on, which is why the buttons do nothing. Hold the two buttons marked with the padlock symbol for three seconds to release it.
Cb or C6
Calibration mode. The machine is relearning how to weigh a load and takes one to three minutes to do it. It has to run with the drum empty, and it is not a fault.

dn

A firmware update is downloading. Leave the machine powered on; it usually takes about fifteen minutes. Contact support only if it is still showing after half an hour.
SDC or 5DC
The detergent drawer is not fully shut. Push it until it clicks. On machines with an automatic dispenser this appears whenever the drawer is left proud of the panel.
Self Clean reminder
A prompt to run the self clean cycle, not a breakdown. Ignoring it for long enough is how front loaders develop the smell people blame on the machine being faulty.