Samsung Washer de Error Code: What It Means and How to Fix It
Updated · from manufacturer service documentation
The de code on a Samsung washer means the door was detected as open while the washer was trying to lock it. This is the platform equivalent of the DC (Door Check) code used on other Samsung washer generations — same underlying issue (the door isn't confirmed closed/locked), different platform label.
What Causes the de Code
| Cause | Likelihood | DIY difficulty | Related part |
|---|---|---|---|
| Door not fully closed | Most common | Easy — close door firmly | — |
| Door switch/reed sensor defective | Common | Moderate — multimeter | Door switch (reed SW) |
| Door lock switch unit not inserted or damaged | Less common | Moderate — check unit | Door lock switch unit |
| Wire disconnected at the door circuit | Less common | Moderate — check wiring | Wiring harness |
| Main PCB defective | Rare | Pro repair | Main PCB |
How to Fix the de Error, Step by Step
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Close the door firmly and restart the cycle
Since de means the washer detected the door as open specifically during the lock attempt, a door that isn't fully closed is the most likely and simplest cause.
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Run the Quick Test Mode Door Lock/Unlock Test
Per Samsung's documentation, this is the specific documented step for the de code — it directly exercises the lock and unlock mechanism so you can see whether it's cycling correctly.
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Check the door switch (reed sensor) resistance
On the related DC platform, this reads approximately 0.2 Ω between terminals — a reading far outside that points to a failed switch.
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Check the door lock switch unit is properly inserted and undamaged
Confirm it's seated correctly and the wire connecting it isn't disconnected.
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If everything above checks out, the main PCB may be defective
This is a job for a technician.
Which Models This Applies To
Documented for the Samsung WA50F9A6DS / WA48H7400 (WA-F900A) series (where this fault displays as de). Samsung's other top-load washer series (WA48H7400AW, WA48J7700AW, WA48J7770AP/AW) use the code DC for the same type of door-check fault — see the dedicated DC page for that platform's specific reed-switch and door-motor resistance values.
See also: Samsung washer DC · Samsung washer 4E. Full list: all Samsung washer error codes.
Frequently Asked Questions
Is de the same problem as DC on a Samsung washer?
Yes — both mean the door isn't confirmed closed/locked; de and DC are just different generations' labels for essentially the same door-check fault.
Why did de appear specifically while the washer was trying to lock?
That's the fault's exact trigger condition per Samsung's documentation — the control attempted to lock the door and detected it as open at that moment, rather than the door failing to close at some other point in the cycle.
How do I clear the de code?
Close the door firmly and restart the cycle. If it recurs, run the Door Lock/Unlock Test in Quick Test Mode to check whether the lock mechanism is cycling correctly.
Is it safe to keep using the washer with a de code?
The washer won't run a cycle until the door locks successfully, so there's no operating risk — but the load will sit unwashed until the door issue is resolved.
Based on the Samsung service documentation for the WA50F9A6DS and WA48J7700AW washer series. Last updated: .