Product review (4 stars): OEM replacement part  -  ***UPDATE***
Does it's job exactly although it's expensive just to replace a broken hook inside (for me) which should be made of metal in the first place.

I suppose however like almost everything these days, it's made of plastic to save a few pennies and the door hook/latch is also plastic (that's what broke in my last assembly) so treat it with care.

This is the part you want if you're getting the 'F DL' error code.  My machine works if I hold the door closed when the machine is on - so I know it's this  door assembly.  This is one big part that holds the switch, the latch, and electrics so you know there's nothing else that can be causing this - other than an electrical issue with the main circuit board.

Easy to install - takes about 10 minutes. Look on Youtube for videos of how to change this part.  The hardest part is replacing the metal spring clamp around the boot once done - and that takes about a minute or two!

I bought this through a 3rd party vendor via Amazon so shipping was extra.  The original door assembly lasted 10 years so I hope this one does too.

In all, it's expensive for what it is but necessary if you don't want to buy a new machine!

***UPDATE*** 11/12/14
Still going strong after a year. I expect it to last as long as I don't abuse it.