OE on an LG dishwasher means the drain pump ran but water level in the tub did not drop to the expected level within the timeout window. The leading cause is a clogged mesh filter. LG's mesh filter is at the rear bottom of the tub and requires a twist to remove , it is different from the pull-up filter style found on Whirlpool and Bosch models.
I see this code most often when a homeowner forgets that LG tucked the main filter way in the back corner. Unlike other brands where the filter is front and center, this one hides under the spray arm. If that mesh gets blinded by grease or calcium, the pump just spins its wheels. Ignore this long enough and you'll end up with a seized pump impeller, which turns a free cleaning job into an $80 part swap.
LgDishwasherSeverity: moderate88% DIY Success
Time to Fix
15–60 min
Difficulty
beginner
Parts Cost
$32 – $52
Tools Needed
Phillips #2 screwdriver, Flathead screwdriver (for prying the toe kick panel)
What Does the OE Code Mean?
Don't jump to buying a new pump just yet. Eight out of ten OE codes I see are caused by a blockage in the high loop under your sink or a clogged garbage disposal nipple, not a dead pump. It's a timeout error, meaning the control board gave the pump enough time to drain but the sensor still detected water. Most of the time you're looking at 20 minutes of work, not a service call.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Clogged mesh drain filter at the rear bottom of the tub40%
Kinked or clogged drain hose24%
Blocked air gap or garbage disposal connection14%
Food debris blocking the pump impeller12%
Failed drain pump motor winding10%
Symptoms You May Notice
There's standing water sitting in the bottom of the tub after the cycle ends, sometimes an inch or two deep, just sitting there.
OE flashes on the display right at the end of the drain cycle and the machine stops cold.
You can hear the drain pump humming or buzzing, but the water level isn't dropping.
The cycle cuts off early, usually somewhere in the final drain sequence, and the display throws the error instead of finishing.
Your dishes smell a little funky even after a full wash because dirty water is siphoning back in from the drain hose.
Can you reset a Lg dishwasher to clear the OE code?
To clear the code after your repair, press the Power button to turn the unit off, then back on. Select the Rinse Only cycle or just hold the Cancel and Drain button for three seconds. This forces the pump to run immediately. If the water clears within two minutes, the logic board will reset the error and let you start a normal wash.
Tools Required for Diagnosis
Phillips #2 screwdriverFlathead screwdriver (for prying the toe kick panel)Multimeter with ohms settingNeedle-nose pliersOld toothbrush (for scrubbing the filter mesh)Bucket or old towels to catch water when the filter comes out
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range8–15 ohms
ConditionIf Open (OL) or infinite, replace component.
Replacement Parts
If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.
Part Name
OEM Number
Estimated Price
Drain Pump4681ED1003A · $32–$52
4681ED1003A
$32 – $52
Frequently Asked Questions
How is LG's drain filter different from other brands?
The big difference is location and the locking mechanism. Most brands put the filter right under the spray arm hub, but LG offsets theirs toward the rear of the tub. It also uses a much finer mesh than older domestic brands, which is great for protecting the pump but means it clogs way faster with grease and fine silt. I tell every LG dishwasher owner the same thing: pull and rinse that filter every single month. Seriously, put it in your phone calendar right now. Ten minutes a month beats a service call every time.
What does 8-15 ohms mean for the LG drain pump test?
Think of ohms like the health of the motor's internal wiring. If your meter shows something like 1 or 2 ohms, the copper coils inside have melted together, that's a short. If it shows OL on the display, the wire is snapped somewhere. A healthy LG pump needs that 8 to 15 ohm resistance to build up the magnetic field required to spin the impeller against the weight of the standing water. Outside that range, the pump's done and no amount of cleaning is going to fix it.
Can I still run my dishwasher if the OE code cleared on its own?
Honestly, you probably can get a load or two in. But here's the thing: the code cleared because the pump eventually pushed the water through, not because the underlying problem went away. If it comes back on the next cycle, something is actively slowing down your drain. I'd clean that filter before you run another load just to be safe. The worst case if you keep ignoring it is the pump motor overheats trying to push through a restriction and the windings burn out. Then you're buying a part instead of just spending five minutes with a toothbrush.
How much does fixing the OE error actually cost?
If it's a clogged filter, it's free. That's probably 80% of cases right there. If the drain hose needs rerouting or the disposal knockout wasn't done, that's still free if you're doing it yourself. Drain pump replacement is the expensive scenario. The LG pump part 4681ED1003A runs about $40 to $60 online, and if you're having a tech do it you're looking at $150 to $250 total with labor. Definitely worth spending ten minutes checking the filter and hose before you call anyone.
Why does my LG show OE at the end of every cycle but drains fine when I hit cancel?
This is actually a really common pattern and it almost always points to a partial blockage. When you hit cancel, the pump gets a fresh start with a shorter, more aggressive drain cycle. During normal end-of-cycle drain, there's more debris in the water, more detergent residue, more food particles, so the drain is slightly slower. That extra resistance pushes it over the timeout threshold and triggers the code. Clean the filter thoroughly and check the drain hose height under the sink. Bet the problem disappears after that.
My dishwasher is brand new and already showing OE. What did I do wrong?
Almost certainly the garbage disposal knockout plug, and don't feel bad, this is the number one install mistake I see. When you connect a dishwasher drain hose to a new disposal, there's a plastic plug inside the inlet port that you have to physically knock out with a screwdriver and a few taps of a hammer before you attach the hose. If that plug is still in there, water has literally nowhere to go. Check your disposal's instruction bag. If the plug is in there, you found it. Knock it out from inside the disposal inlet, reconnect the hose, and you're done.