Samsung dC fault codewhat it means and how to fix it
The dryer thinks the door is open. Samsung name a cause most people would never guess: the child lock can produce this on a machine that is not even running.
Before you start
What dC means
Straightforwardly, Samsung give this as "Dryer operation with the door open" and tell you to close the door, make sure no laundry is caught in it, and start again. What lifts it above the ordinary is the third thing they say: "Check if the Child Lock is on. If the Child Lock is on, you may get this message when you open the door even though the dryer is not operating." That is a genuinely obscure behaviour and it explains an otherwise baffling situation — a machine sitting idle that complains about its door the moment you open it.
If you have children and the lock is engaged, that is very likely all this is. The ordinary version is the ordinary version: a dryer door needs to be pushed until the catch engages, and a sleeve or a corner of a duvet cover across the opening will hold it a few millimetres out.
Samsung ask you to check for laundry caught in the door specifically, which suggests they see plenty of it. Note that on Samsung’s newest machines you will not see this code at all — the Bespoke AI generation displays the sentence "Door is open" instead, and has a second message, "Open door & check inside", for the child lock case.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| The door is not fully latched | It needs a positive push until the catch clicks. A door resting against the frame looks closed and is not, and the machine has no way to distinguish that from open. | Common |
| Washing is caught in the door opening | Samsung name this explicitly. A sleeve or a corner of bedding trapped in the seal holds the door a few millimetres proud, which is enough for the catch to miss. | Common |
| The child lock is engaged | Samsung’s own explanation: with the lock on, opening the door can produce this message even though the machine is not running. Nothing is wrong and nothing needs fixing. | Occasional |
| The door switch has failed | When the door is demonstrably shut and nothing is caught, the switch reporting its state is what remains. Samsung have a separate code, dF, for a switch they consider incorrect rather than merely open. | Occasional |
What to try yourself
Open the door fully and close it with a deliberate push until you feel the catch engage.
Run a hand round the opening for a sleeve, a corner of bedding or a sock trapped in the seal.
Check whether the child lock is on. Samsung confirm it can produce this message on a machine that is not even running, and turning it off is the whole fix if so.
Look at the catch on the door and the socket it enters for damage, lint packed into the recess, or a catch that is loose.
Start a short cycle. If dC persists with the door plainly shut and the lock off, the switch needs looking at.
Get a qualified appliance engineer to look at your Samsung dC
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified appliance engineer, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What it costs to fix
Typical repair cost
£0–£130
Time on site
5 minutes
Free in nearly every case. A door switch or lock assembly with labour is the only chargeable outcome and sits at the cheaper end of dryer repairs.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
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Related Samsung fault codes
- NCGet it checkedSamsung’s prompt to deal with the lint filter. Rated more seriously here than Samsung rate it, because a blocked filter on a dryer is not the same as a blocked filter elsewhere.Related: same brand
- 5CUsually simple to fixThe machine cannot get rid of its condensed water. Samsung group four causes under this code and the commonest is simply a full tank.Related: same brand
- HCGet it checkedThe compressor is overheating. Samsung’s website tells you to get an electrician to check the heating element — your machine does not have one, and their own manual says clean the heat exchanger.Related: same brand
- HCLStop — call an engineerThe refrigerant has leaked out of the sealed circuit. It is propane, and Samsung’s instruction is that the machine must not be used at all until an engineer has been.Related: same brand
- NC2Get it checkedThe inner cover of the heat exchanger is not fitted properly. Usually something an owner has just done, and usually fixable in a minute.Related: same brand
- tC5Get it checkedThe sensor watching the compressor temperature is not reporting properly. Samsung ask for a longer pause than usual before you try again.Related: same brand
Own a Samsung tumble dryer? Save it and its codes come first next time.
Related guides
Common questions about Samsung dC
The machine is not even running and it says the door is open.
Check the child lock. Samsung document exactly this: with the lock engaged, opening the door can trigger the message on an idle machine. It is behaviour rather than a fault.
My display shows dE, or the words "Door is open".
All the same thing. dE is the older display convention, dC the newer, and Samsung’s current Bespoke AI machines have dropped codes for this fault entirely in favour of the plain sentence.
What is dF then?
A different and more serious code. Samsung give dF as "Incorrect door switch" and their instruction is to check for loose or damaged wiring in the door lock circuit, noting the whole assembly may need replacing. dC means the machine thinks the door is open; dF means it does not trust the switch.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer support portal
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.