When our dw did that, it was caused by build-up of detergent. Repairman
poured a quart of vinegar into the dw, no dishes, and ran it through a
cycle. Cured. The build-up caused sudsing that kept water from
draining properly so that it ran out around the door.
I had a Kenmore/Whirlpool DW leaking around the door. After wasting
money replacing the door gaskets I found out that the O-ring for the
pump cover was blown out. The pump was blasting water out the side
straight toward the door.
Another DW had a similar problem - it ended up being crud built up on
the vent in the door. The crud would absorb water then drip inside the
door and out the bottom.
The vinegar is always a good first step. Not a bad idea to spalash a
little vinegar in with each load especially if you have hard water.
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