From an earlier post:
If you want to modify the water level, first bear in mind to be very careful and remember it will void your warranty.
First, unplug the machine and remove the top lid of the washer (the two screws in back hold it in place).
If you are facing the front of the machine, slide the top lid of the washer away from you, then lift it off.
On the right inside near the front panel you should see a black round thing that a bunch of wires are attached to.
In the middle of the round thing is a screw. Take a Phillips-head screwdriver and turn it clockwise.
The more you turn it, the higher the water level will be. I turned the screwdriver about 8 revolutions and my level now fills about 1/3 the way up the window.
Hope this helps! Post some pics when you are done.