Hi Jim,
I recently noticed exactly the same symptoms with my
LDS4821 which I think is a similar age.
After a bit of head scratching and a similar door cover
removal exercise I also figured it must be coming via
that round vent and then on down the plastic duct that
runs to the bottom left vent in the door that you
photographed.
Here's what I did which has certainly fixed my leak:
1/ First I cleaned around the inside of the round vent
on this inside of the door. Specifically I removed all
the accumulated crud around the edges of the circular
yellow rubber gasket piece at the center of the vent on
the inside the machine (your first photo). I did this
after untwisting the circular grill that holds that in
place - my vent unit behind that grill also wiggles
around by the way, but only when that round grill has
been unscrewed! I was careful to make sure that the unit
behind the grill was seated properly again when I
twisted the grill back on to tighten it and hold it in
place again. I actually checked this with the front of the
door taken off for this second step below to make sure
there would be no issues with the outer seal around that
vent unit (where it presses up against the inside of the
metal door to form a seal when the round vent grill is srewed on).
2/ This I think is actually the critical step. I noticed
a second black hose that runs down from the plastic vent
structure almost directly behind where the round grill
is positioned on the inside of the door. See the picture I've attached re. the tube I am talking about. Looking at this I figured it's some kind of internal drain (that seems to drain back into the washing compartment itself at the
bottom). Given that I'd seen some crud on the
yellow rubber gasket I wondered if some crud had also
blocked the top of this hose, leaving any water that gets in there to
then run on down and out of that vent at the bottom
instead. Sure enough when I employed the crude (but
apparently effective!) technique of sucking on the
bottom end of that tube to see if it was clear, I soon
enough felt a blockage break and I just had time to aim
the tube away before a bunch of grey crud came sweeping
down the tube, followed by some clearer water. By the
looks of it you might be able to unclip the hose clamp
at the top and do it somewhat more professionally to
avoid the risk of a mouthful of 2-3 year old dish crud
in your mouth!
I've just run it through a full 'normal' cycle and it's
back to working normally again - no more leaks.
Well dishwashers may **** at times, but apparently I do
too...
Hope this helps.
-Dan
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