Error code
DC
Meaning
The dryer thinks the door is open while running
Moderate
What to do
Why this happens
Possible causes include an improperly closed or unlatched door, a loose door sensor unit, or a shorted door sensor unit.
How to fix it
If it still shows the error with the door closed, the door switch likely needs replacing — a technician can do this in under an hour.
SourceSamsung service manual