My LG dishwasher when I turn it on it drains the water, then it fills it up with water, about 1 min. later gives me the code E1 and drains the water again...

SOURCE: Dishwasher fills and drains at the same time

your water is syphoning out make sure your drin hose is up

SOURCE: LG Dishwasher (LDS5811) - low water level

1E= Inlet Error
Condition>>>
Not reached to the normal
water level in spite
of 10 min. water supply


The Water Supply Tap is closed.
The Water Supply is shut off.
The Inlet Hose is kinked.
The Water Pressure is very low.
(below 10 psi)
Inlet Valve is OK?
The filter of Inlet Valve is clogged
by impure water.
The Hall sensor is OK?
The Impeller of Air Guide is bound

Solutions:

Take action on Water Supply
device.
Measure the electric resistance of
Inlet Valve. (950-1300 )
Clean the filter of Inlet Valve.
Check the frequency of Inlet Water
by the Test Mode.
Replace the Air Braker

SOURCE: GE Dishwasher fills with water but does not "spray water" on dish

Here are a few things that might help you out, first is you could have a bad heating element in your dish washer, when it fills with water it has to reach a certain temperature before continuing to the next cycle, next thing is you could have a bad thermostat, or your timer is defective.

SOURCE: LG Dishwasher making grinding noise then blinking E1 code 10 minutes later

Well done by resolving this problem. The other way to avoid the siphoning problem through the drain hose is adding an air gap valve/connector (available at any hardware store). You can use it even if you don't have a garbage disposal in your kitchen sink. That will assure that you have the proper height of the drain hose.
Hope this helps!

SOURCE: Error code E1 on LG dishwasher

I have this sometimes where E1 is reported and the pump remains on. The following voodoo has worked for me.

1) Make sure there is not a real drain problem.
2) Cancel any cycle or turn the power button off then on.
3) Run a rinse cycle (15 minutes).
4) If pump continues to run, turn off the power to the dishwasher, let stand for a minute, then repeat steps 2-3. If still not working, leave power off over night and leave the door open then try again.

In each iteration, it is important to curse your LG product and/or threaten it with replacement.