Oe code on LG dishwasher following garbage disposal replacement

OE indicates a drain error. Your model number doesn't fit the usual pattern for LG dishwashers; LDT5665WW and LDS4821WW are a couple of recent model numbers.

To start diagnosing and fixing the OE error, first check the discharge hose. Make sure that it isn't clogged, kinked or improperly positioned. Make sure that the pipe or food disposer that the drain hose connects to isn't clogged. (Check into the rest of the drain pipe if needed.)

Next check that the float switch inside the dishwasher isn't blocked. This indicates the water level and if a foreign object is holding it open, the dishwasher will continue to try to drain the water.

Finally check for any blockage in the drain pump. Also check the pump for obvious damage. If the pump is damaged, replace it.

After you've checked and fixed (as needed) the above issues, try the dishwasher again. If the OE code recurs, then you need to replace the drain motor pump assembly.

If your dishwasher is under warranty, contact LG. Otherwise, please check and post your machine's model number. I can check to see if the parts are available.

I hope this helps.

Cindy Wells

Is disposal newly installed? If so, there’s a knock out plug in inlet to disposal. If that’s not it, disposal or drain is obstructed

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Yes probably a connection. The dishwasher drain connects to the the Garbage disposal . If the line is kinked then the dishwasher will not drain. Plus the dishwasher has to have a plug knocked out where the drain line goes into the garbage disposal. I am sure this is your problem.

It sounds like you've done everything fine. I would disconnect the dishwasher drain line from the disposal, have a bucket ready and see if it will drain. It's possible that there is a plug or something else left in the disposal opening that is blocking the water. If the dishwasher won't drain with the hose off of the disposal, there is a problem with the dishwasher that has nothing to do with your disposal installation. Hope this helps and good luck!

HI.This is a drain issue. check the following areas for faults.

1. Air gap / Drain hoses
If there is an air gap (located in the sink, near the faucet), check to see if it is clogged. Unscrew the top cap and see if there is anything blocking inside. Note: If there is no air gap installed, the dishwasher might not drain properly.

If the drain hose is clogged, the dishwasher would not drain. If there is an air gap installed, it is very common that a hose going from the air gap into the garbage disposer is clogged. Remove and clean the hose. Make sure to reattach the hose before starting the dishwasher.

Note: If you recently had a garbage disposer installed, it is common to overlook removing the drain plug.

Ok, if the hoses are ok and not clogged, this will confirm a major issue that concerns the drain assembly or pump impeller.

replace the pump(drain) if found to be faulty.

I actually own an LG LDF8812 myself, except mine is stainless steel, not white. So be it. :-)
Anyway, it sounds like you have just unboxed the unit and it is brand new, not just new to you. I am also assuming that you have this dishwasher connected to an Air Gap valve which is connected to the garbage disposal. Please reply if I am wrong.
Because it is (apparently) new, the first thing I would check is that any water is draining from the unit. A common problem on new installations is that the knockout inside the neck of the garbage disposal unit. A quick way to test that is begin the dishwasher filling, then open the door and press the two buttons that give you Cancel. Hold for three seconds and the DW will begin to drain. Being careful of the hot water that should be draining into the kitchen sink via the disposal, but watch for water to come flowing with a healthy stream - not wimpy.
Please reply with what you have found and correct my assumptions that I got wrong. Good Luck!
OH, if the problem is not something at the end of the drain hose, before you try to crack the unit open (and possibly void your waranty) dial the number on in the user guide and schedule a service call asap. Have your proof of purchase available.

Does not sound like these problems are directly related to the disposer. Grinding sound is most likely the impeller on the washer's pump. The washer gets to the first pump out and is unable to pump due to bad impeller or an obstruction. Bad impeller means replace pump motor. (not very hard) Check water supply to dishwasher. Valve turned off or line kinked? Filter screen at solonoid valve plugged?

On the display a D looks much like an O. You probably have a DE error code which indicates a drain problem. Check your drain line, make sure the hose isnt kinked and the drain line is not blocked especially at the connection to the sink or garbage disposal. If that is all clear you may have a blockage in your drain pump....or the pump itself could be bad.

The ?OE? indicates drainage trouble. It could be a clogged in the drain line. Often the problem is at the point where the drain line attaches to the garbage disposer or household drain line. You should remove this line and clear it form any debris in the hose or the hose connection. Be sure to reattach the hose before starting the dishwasher again. Good luck!