LG washer that is giving a error code of either an "FE" or "OE" error. OK I started the unit and let it start filling then turned the power off and it fill for over a min without the power on. Is that normal for LG???
Make: LG Model: WM2277HW
If the power was off no it should not be filling, you may have a sticky water valve, most likely. This could be the cause of the code as well. If the unit keeps filling with the power off I would replace the water valves before your house is flooded.
Here is a link to the part breakdown for your machine. The valves are part #F170 and F160. If you can determine which valve is sticking replace that one. Now what you may want to do is see if you can get it to stick again and quickly unplug the machine to see if it continues to fill as there is a chance you have a control issue. If it continues to fill after it is unplugged even for a few secs there is something sticky in the valve.
If you need anything else let me know