LG Dishwasher Model LD-4120M Error 0E

LG 2050 error 0E error. - You may not want to believe this but it is true!!
My dishwasher has failed with 0E error 5 times now - it has cost me R350 each time - the problem IS NOT necessarily a blocked drain hose or the drain pump it could be the thermostat micro switch!!! the thermostat is located at the rear of the right bottom side of the dishwasher(held by oval nylon plastic housing). Turn the machine off. remove the right side panel.(remove top {2screws in lid at back}, remove right panel screws {2 behind door, 3 bottom back panel, 2 behind panel below door {pull panel out from top [no screws pushes in & out of place]}. Locate oval nylon/plastic shape located as above - micro-switch is in the middle (3 wire connectors in 1 block) thermostat is 2 connectors ( 1 each side of micro-switch). use screwdriver to push thermostat back into the nylon housing on both sides (it has worked its way out a bit over time and stops the micro-switch working). Reassemble and dishwasher starts to work again!!!!
Good Luck - Alan

I had the same endless problem and finaly put a cleaning product through with heaps of restarts and now the machine works perfectly. So anyone out there with the OE error should try this inexpensive solution. If it does not work you have not lost much. You may need to restart several times during the process and is a great pain but maybe it will solve your problem .

The most common cause of an OE error code on a modern LG dishwasher is:
1. Blocked drain hose
2. Obstruction in the sump area (beneath the filter, which needs to be removed to check for onstruction)
3. Failing drain motor. 
else you need to REPLACE THE PCB POWER CONTROL BOARD
Good Luck!!!

Sometimes the wiring behind the front panel becomes "stuck" to the sound deadening material. After many openings and closings, the wire can break. This happened to me. It was a gray wire which had stretched and broken.
What I did to fix it was to strip and re-connect he wire, and twist a wire nut on the bare end. I then placed some plastic behind the wire bundle so that it wouldn't stick again.
Messages to LG about the problem went unanswered.

OE means drain hose is blocked or somthing wrong with the pump. personally i say if you have an LG get rid of it and get a decent dishwasher like a Fisher & Paykel , a Bosch or best of all an Asko. LG and samsung will just keep costing you more money . - Anon Salesman

I have LG Direct Drive. I had the OE error code, just took the filters out and washed them and it worked fine, am thinking that it must be extremely sensitive to fine grease on the filter. My washer is only 2 weeks old. I opened the side casing and squeezed the pipes, blew air in the lines... no luck. Washed the filters and hey presto... wife off the back.

My GREY wire was broken also!!! Like it was cut - I think there's a manufacturing defect here. Yes, stuck in the tar-like deadening material and perhaps routed behind and over other wires - couldn't tell it was broken! Like a perfect cut thru thin insulation and all. Tip for others: Remove the 14 screws holding on the front cover and find the grey wire just above the door hinge. You do not need to even remove the machine.

I've had the OE error a couple of times. Like others, one time it was a broken wire under the door panel, but mine was purple not grey. Twice its been something stuck in the air gap. So just don't think the hose is clogged, check the air gap if you have one.

I have a LG dishwasher that was not draining. I also got OE Error with LG dishwasher. There was a broken gray wire behind front panel in wiring harness. Removed front panel and fixed gray wire with electrical tape. Works great! :)

Remove right side cover. There is a clear trap for the drain. Unscrew vent inside dishwasher to remove. Cleaned out food which was blocking one-way valve. Problem solved!

After replacing the main pump, I got the same fault code. I found that the heater element got pulled out while disconnecting the connectors. It is located on the right hand side down at the bottom of the dishwasher.I pushed it in all the way to the earth terminal and the fault cleared.

Find the hose that it drains from unplug from drain end and blow really hard then remove the filter and repeat then turn on and put thru intensive cycle

I had the same OE error, tried everything with the drain hose to remove blockage, shaking, blowing it out with air, including letting CLR soak in the bottom of the unit. (Bad idea DO NOT USE CLR) Had a repair man in GP, AB. come and rip the dishwasher apart, tell me I was using too much soap, there was nothing wrong with the unit except the CLR wrecked all the seals in the lower filter and LG didn't have replacement seals, so the cost to replace pump ***. was $600, he charged me $140. I got Orings from a hydraulic shop (free) and made new better seals, cleaned the filter assembly, installed the seals myself, tried the dishwasher and still got the OE error, was reading mickey42do's problem above, pulled the front panel off and lone behold the grey wire was broken, exact same problem, fixed the wire, installed some plastic and bingo bango we are up and running. Good job Mickey42do!!!