ddC/dC3 concerns the Add Door, not a drain filter. Inspect the small hatch closure and visible obstruction only when access is safe.
Samsung washers whose own manual identifies the displayed code with the meaning below. Codes can differ by generation; this is not a universal parts diagnosis.
Wait for motion to stop and the door or lid to unlock. Water may be hot. Isolate power and follow the exact manual before any user filter maintenance. Never open a filter against a full drum, force a lock or bypass an interlock.
Compare the behavior
An Add Door closure problem belongs to the small hatch even when the main door looks normal. Keeping the two closures separate avoids testing or replacing the wrong assembly.
| Observed state | Interpretation / next step |
|---|---|
| Hatch state before the code | ddC/dC3 concerns the Add Door, not a drain filter. Inspect the small hatch closure and visible obstruction only when access is safe. |
| Preserve the closure history | Inspect safe hatch closure; service damage or recurring confirmation failure. |
Code-specific checks
Hatch state before the code
The small hatch and main door are different confirmation points. A firmly closed main door therefore does not settle an Add Door complaint. Note whether the error appeared immediately after using the hatch or before any attempt to add laundry.
Check only the Add Door
Remove caught laundry without forcing or prying the hatch. Close it by the normal procedure, not by pushing the main door harder. Damage, failure to release safely or a code that returns after correct closure belongs with service.
Preserve the closure history
Do not use a main-door lock replacement as a guess for this code. A recorded Add Door event directs a technician toward the appropriate system without declaring its switch, wiring or control defective.
If the warning returns
Inspect safe hatch closure; service damage or recurring confirmation failure.
When to stop and get help
Only carry out maintenance permitted in your model’s manual. For service, note the full model number and suffix, displayed code, selected cycle and what happened during the checks. Leave internal wiring, gas components, pumps and safety devices to a qualified professional. A symptom alone does not identify a failed part.
Sources & references
- ddC/dC3 is the Add Door family ddC, dC3: Add Door error
Based on publicly available manuals, manufacturer support and the references listed here. We have not inspected or tested your appliance. Follow the instructions for your exact model; a guide cannot replace an in-person diagnosis.