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E4 indicates due to leak anti flood device in the base of appliance is activated.
You will have to unplug the dishwasher and pull it out.
Now tip it backwards by around 45 degrees so excess water drains off completely.
Now check to make sure nothing is clogged and drain hose is clean.
Plug it back and check if the error code appears.
Fingers crossed this should work, let me know how it goes.
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