LG WF-T700 Troubleeshooting DE blinking

The "DE" code indicates a door open error. This can be caused by the door not closing all the way (this could be because of bent door/hinges or the door gasket bunching up and not permitting the door to close properly), loose electrical connections at the door switch or powerboard assembly, or the door switch itself is faulty. It can be tested using a multimeter or ohmmeter and checking for continuity. A lack of continuity would mean a bad switch. Also check the door gasket for "bunching" and you can unplug and reseat electrical connections. These are some areas to look at. Be sure to disconnect unit from power before attempting any repair/troubleshooting. Really sorry for your trouble and I hope this helped. Best wishes.