Samsung · Dryer Serious
dF — Door Flow / Door Circuit Fault
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.
- Keep using it?
- Limited use only
- DIY difficulty
- Moderate
- Verified against
- samsung.com ↗
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.
Why it happens
Typical signs: Dryer won't start · Stops shortly after starting · dF flashes when door is closed · Door appears latched but control disagrees
- Failed door switch Plunger-style door switch worn or contacts oxidized — most common cause.
- Misaligned strike or latch Bent strike or worn door bumpers letting door sit slightly open.
- Loose / damaged door switch wiring Harness pulled loose at the switch or pinched at the hinge.
- Main PCB door-sense fault Less common — board can't read the switch even with a known-good switch installed.
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
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.