Door will not lock
Hello, first of all I am sorry you are having problems with an item thats not that old, but unfortunately the days of washers and dryers that last for 15 or 20 years is over, they traded that for the fancy buttons and control panels, replacing relays and mechanical items with circuitry and software, unfortunatelly, you may not want to accept it, but I agree with LG given what you have said in your post, I wish there was a sequence of keys I could tell you to press to fix the problem, but the components have not become that user friendly yet. So a replacement board would be the best bet, unless you want to try repalcing the door latch CATCH, on the machine side not the door side, there will be a sensor going to the board somewhere telling it the door is closed and ready to wash, this may be an unnecessary part change, then again the Bpard may be unneccessary if you have never had a technician look at hte dryer in person, (There is no substitute for being able to put your hands on the object you are trying to repair). So if all you have gotten is Phone and internet support so far, you have gotten some free or cheap advice if this helps and you do not reject me, But you may want a service tech to actually put his ahnds on it, if you can get free estimates in your area, get more than one opinion.
Please give me a good rating if this helps you solve or points you in the right direction for solving your issue, Thanks for the question.
P.S. This is only thing I could find about DE error which is right out of the manual
DE
Is the door opened or not
completely closed?
Solution:
Close the door completely.
If DE is not released, call for service.
That is why I based my solution as I did