What should I check first for Samsung washer error dC?

Push the door firmly shut and check nothing is caught in the seal.

What usually causes Samsung washer error dC?

Something is stopping the door closing fully

dCMedium

Samsung washer error dC

dC means the door will not lock, so the washer cannot start the cycle.

Also shows as DC, dE, dE1

Symptom
dC
Free checks
2 checks
Then the part
Something is stopping the door closing fully

The 2 free checks

Start at the top. Unplug the machine first.

01
Push the door firmly shut and check nothing is caught in the seal.
02
Unplug the washer and check the wiring harness connections between the door lock assembly and the main control board.

What causes it

Listed most likely first.

Cause	How often	DIY
Something is stopping the door closing fully	Most common	Yes
A loose or damaged wire harness between the door lock assembly and the main control board	Common	Call a pro
The door lock assembly has failed	Common	Call a pro

Before you check anything

Disconnect the power first. Unplug the machine at the socket, or switch off its circuit at the consumer unit if it is hard-wired. Do this before opening any panel, reaching into a pump filter, or moving the appliance.
Turn off the water before disconnecting a hose, and have a towel and a shallow tray ready — a drain hose holds water even when the drum looks empty.
Gas, mains wiring and sealed refrigeration are for a qualified professional — in many countries that is a legal requirement, not advice. If you smell gas, do not touch any switch: leave, and call your gas emergency number from outside.
Stop if you smell burning, see scorched wiring, or find water near an electrical connection. None of those is a code to look up.

The checks on this page are the manufacturer’s own, rewritten and sourced, and they are reference information rather than a repair instruction for your particular machine. Model, age and installation all change what is safe to do. You are the one standing in front of it — if a step looks wrong for the machine you have, trust that and call a technician.