DE Error on Samsung washing machines (usually) means that “the door is open”. As with most error codes though you can’t take it literally because very often this error will display when the door is clearly closed. What it means is, that it thinks the door is open, presumably because it’s not getting power passed from the door interlock.
Does DE error mean a faulty door lock?
It could be explained by a faulty door lock, but as this forum topic shows it doesn’t always fix the fault if you just replace the interlock- Samsung Washing Machine De Error
So how do you know if the door lock needs replacing or not? Well the first thing to check is that the door is closing properly. When the door is closed, the latch on the door pushes into the door interlock, it should latch firmly and activate a part inside the lock.
When this part is physically pushed to one side by the door catch the interlock activates and locks the door. At the same time, power is passed from one side of the door lock to the other and on to the rest of the machine.
If the door latch is broken, worn, or a spring come off etc. it may not activate the door lock inside. Of course if the door lock is faulty the same problem will occur. Maybe even a door that has dropped and is not lining up properly any more due to wear at the hinge might fail to operate the interlock properly.
It is possible for a door to close, and latch shut, but not activate the door lock properly. If everything seems OK you could always try spraying a little wd-40 into the door lock opening in case something’s stiffened up. You could also try wiggling the door up and down a bit once closed to see if it all of a sudden operates the interlock.
It’s also possible that a bad connection or broken wire on the door interlock supplying the power, the neutral return, or the power to the rest of the machine once activated is causing a fault.
Do not reach into the machine to fiddle with the door lock with the machine plugged in. Mains voltage goes to the door interlock.
Buy new door interlock
If you do decide to buy a new door interlock please consider using Ransom Spares – Buy new door interlock