dE4
LG Washing Machine
Severity: ModerateWhat Does This Error Mean?
The dE4 error means the small add-item door on your LG front-load washer is not closing or latching properly. This door lets you add forgotten laundry items mid-cycle. When it does not seal, the washer stops to prevent leaks.
Affected Models
- WM3900HWA
- WM4000HWA
- WM3700HWA
- LG front-load washers with an add-item door (TurboWash models)
Common Causes
- Small clothing item is caught in the add-item door seal
- The add-item door latch mechanism is worn or broken
- Debris or detergent residue is preventing the door from closing flush
- The door's rubber gasket is deformed or torn and no longer sealing
- Wiring harness to the door's sensor has come loose
How to Fix It
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Open the add-item door and check the door seal and frame for any trapped clothing.
Even a thin sock in the seal can prevent a proper close.
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Clean the door seal and frame thoroughly with a damp cloth.
Remove any detergent residue or lint buildup that might be preventing a tight seal.
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Close the add-item door firmly — press until you hear or feel a click.
The latch must fully engage for the error to clear.
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Inspect the door gasket (rubber seal) for tears or deformation.
A torn gasket cannot seal properly and must be replaced.
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Power cycle the washer — unplug for 60 seconds — then retry the cycle.
If the door is properly closed and sealed, the error should not return.
When to Call a Professional
If the add-item door latch or gasket has physically broken — a technician will need to replace the assembly. Parts and labor for this repair typically cost $80–$160. Avoid forcing cycles with a poorly sealed add-item door as leaks will occur.
Frequently Asked Questions
What is the add-item door on an LG washer?
It is a small secondary door built into the main door on select LG TurboWash models. It lets you toss in a forgotten sock or garment mid-cycle without stopping the full wash. It only opens when water levels are low enough to be safe.
Can I still use my washer if the add-item door won't close properly?
You can try taping it shut temporarily as a very short-term workaround. But this is not recommended for regular use — water can leak and damage the machine. Get the latch or gasket replaced promptly.
How do I prevent the dE4 error from recurring?
Clean the add-item door seal monthly as part of your regular washer maintenance. Make sure the door clicks fully shut every time you use the add-item feature. Avoid overfilling the drum — clothes near the front can interfere with the door.