Samsung Washer DC Error Code: What It Means and How to Fix It
Updated · from manufacturer service documentation
The DC code on a Samsung washer means Door Check — the machine couldn't confirm the door is properly closed and locked. Most cases trace back to the door simply being opened or not latched correctly; a smaller number point to a worn door hook or a failed door lock switch.
What Causes the DC Code
| Cause | Likelihood | DIY difficulty | Related part |
|---|---|---|---|
| Door opened or not closed properly during the cycle | Most common | Easy — close the door | — |
| Door hook deformed, affecting switch contact | Common | Easy — inspect door hook | Door hook |
| Door lock switch unit not inserted, damaged, or disconnected (DC1/DC2) | Less common | Moderate — check switch/wiring | Door lock switch |
| Door pushed by internal pressure difference during Boil wash | Less common | Easy — none, this is a known behavior | — |
| Power switch toggled on/off repeatedly, generating heat (DC2) | Rare | Easy — avoid rapid power cycling | — |
| Main PCB door-detection circuit defective | Rare | Pro repair | Main PCB |
How to Fix the DC Error, Step by Step
-
Close the door firmly
Since DC is triggered whenever the door is detected as open, this resolves the majority of cases immediately.
-
Check the power cord and connection
Since 120V power is connected through the door circuit, verify the power cord isn't disconnected and check its insulation status, repairing if necessary.
-
Test the Reed switch resistance
Checking the white-green wire, the Reed switch should read approximately 0.2 Ω between its terminals. A reading far outside that suggests a switch problem.
-
Test the door motor resistance
Checking the black-brown wire, the door motor should read 33–46 Ω between its terminals.
-
If the code shows DC1 or DC2, check the door lock switch unit specifically
Confirm it's fully inserted, undamaged, and its wiring isn't disconnected. Replace the door lock switch unit if it's defective.
-
Test the lock/unlock contact resistance
Checking the lock (white-red wire) and unlock (white-blue wire) contacts, each should read approximately 0.2 Ω between terminals — check the door lock/unlock state directly if readings are off.
-
If everything above tests normal, the main PCB's door-detection circuit may be defective
This is a job for a technician.
Which Models This Applies To
Documented for the Samsung top-load series WA48H7400AW, WA48J7700AW, WA48J7770AP/AW. Note that DC can also appear briefly during the Boil wash cycle due to a pressure difference pushing on the door from internal temperature changes — this is described as expected behavior on this platform, not a fault, as long as it clears once pressure equalizes.
Full list: all Samsung washer error codes.
Frequently Asked Questions
Is DC dangerous, or can I keep using the washer?
It's a safety check, not damage — the washer just won't run a cycle until it confirms the door is properly closed and locked.
Why does DC appear during the Boil wash cycle specifically?
Per Samsung's documentation, a pressure difference from internal temperature changes during Boil wash can push on the door and trigger this check — it's a known, expected behavior on this platform rather than a defect.
What's the difference between DC, DC1, and DC2?
DC is the general door check. DC1 points specifically to the door lock switch unit (not inserted, damaged, or disconnected) or a main PCB fault. DC2 relates to the power switch being toggled on/off repeatedly, generating heat.
How do I clear the DC code?
Close the door firmly and restart the cycle. If it returns immediately, check the door hook and lock switch before assuming a main PCB fault.
Based on the Samsung service documentation for the WA48J7700AW washer series. Last updated: .