Samsung Dryer dF — Door Flow / Door Circuit Fault
Samsung Dryer · Error code dF
What dF Means
The control board sees a problem with the door switch circuit — it's stuck open or shorted, so the dryer won't start or stops mid-cycle. Sometimes displays after a failed door-lock check on heat-pump models.
Symptoms
- Dryer won't start
- Stops shortly after starting
- dF flashes when door is closed
- Door appears latched but control disagrees
Common Causes
Plunger-style door switch worn or contacts oxidized — most common cause.
Bent strike or worn door bumpers letting door sit slightly open.
Harness pulled loose at the switch or pinched at the hinge.
Less common — board can't read the switch even with a known-good switch installed.
How to Fix It
- Unplug the dryer for 5 minutes to clear the code, then plug back in and test.
- Open and firmly close the door — listen for a solid click. If no click, inspect the door strike for bending.
- Remove the top panel and locate the door switch (small plunger switch near the door opening).
- Test the switch with a multimeter — should read continuity when pressed, open when released.
- Replace the door switch if it fails the continuity test (a $10-20 part).
- Inspect the door switch harness for damage or loose connectors and reseat.
- If switch tests good and wiring is intact, the main control board likely needs replacement.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Samsung Dryer Codes
Verified against manufacturer documentation: samsung.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.