User Rating 
By steve
I got here after googling the same problem.
There are many reports of this "dHE" error - all with BRAND NEW MACHINES !
I rang LG in Sydney, Australia today and amazingly the girl on the phone said there are no known issues with this dryer
(In Australia the combo dryer is known as WD14700RD ) - 7kg washer / 4kg dryer.
Mine has same problem. Whenever the dryer is selected in the program, it stops after the wash phase and flashed dHE (or dHe, can't remember) and thats as far as it gets.
Its a tech, call out tomorrow to try & fix it.
Very poor LG, these are brand new machines, many reports of this problem from googling it but LG have no knowledge a problem.
This may end up being a recall or at the very least, some public announcement of this dHe problem with this washer.
New buyers beware ... It is a fault with brand new machines.
Steve
Melbourne Aust.
steve_aust@hotmail.com