An LG dishwasher that won't drain shows an "OE" code — the same outlet-error family as their washers. It's almost always the filter or drain hose, not the pump.
The known LG issue: OE on an LG dishwasher is the same story as the washer: clean the filter and check the hose before buying a pump.
What's actually different about a LG
Clogged filter Easy
Food debris in the bottom filter blocks the drain.
What you can check: Remove the bottom rack, twist out and rinse the filter assembly.
Drain hose / air gap clog Moderate
Hose to the disposal/standpipe or the countertop air gap clogs.
What you can check: Clean the air gap; check for a disposal knockout plug if recently installed.
Drain pump Pro
Standing water with a hum = pump.
What you can check: Technician replacement.
LG dishwasher fault codes
OE
Drain (outlet) error — clean filter and hose
Try this first: Cut power 1 minute after cleaning the filter, then run a rinse cycle to confirm OE clears.
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Water in the bottom of the dishwasher after a cycle is a classic — and usually simple — problem. A lot of the time it's something you can clear in a few minutes, especially if a new garbage disposal was just installed. Here are the causes in the order we check them.
Safety first: Turn the dishwasher off at the breaker before reaching near the drain pump. Scoop out standing water with a cup and towel first.
Clogged filter or sump Easy
Food, grease, and debris build up in the filter at the bottom of the tub and block drainage. This is the most common cause and an easy clean.
What you can check: Remove the bottom rack, twist out the filter, and rinse it under hot water. Clear any debris in the sump.
Garbage disposal knockout plug Moderate
If a new garbage disposal was recently installed and the dishwasher won't drain, the installer likely forgot to knock out the drain plug inside the disposal inlet. Extremely common.
What you can check: Check under the sink — if a new disposal went in recently, the knockout plug may need to be removed from the disposal's dishwasher inlet.
Clogged or kinked drain hose Moderate
The hose from the dishwasher to the disposal or standpipe can clog or kink.
What you can check: Check the hose under the sink for kinks. A deep clog is a technician clear-out.
Drain pump Pro
The pump that pushes water out can fail or jam with glass or debris.
What you can check: A humming pump with no draining points here. Replacement is a technician repair.
Check valve stuck Pro
A one-way valve keeps drained water from flowing back; if it sticks, drainage suffers.
What you can check: Not a typical DIY check. Diagnosed by a technician.
Is it worth repairing?
The vast majority of dishwasher drain problems are cheap fixes — a filter clean, a knockout plug, or a hose. Even a drain pump is an affordable part. A dishwasher that won't drain is almost always worth repairing.
Frequently asked questions
Why is my LG dishwasher won't drain?
An LG dishwasher that won't drain shows an "OE" code — the same outlet-error family as their washers. It's almost always the filter or drain hose, not the pump.
Is there a known issue with LG dishwashers won't drain?
OE on an LG dishwasher is the same story as the washer: clean the filter and check the hose before buying a pump.
Why is there water at the bottom of my dishwasher?
A small amount is normal; a full pool after a cycle means it didn't drain. The usual causes are a clogged filter, a garbage-disposal knockout plug that was never removed, a kinked drain hose, or a failed drain pump.
I just got a new garbage disposal and my dishwasher won't drain — why?
This is very common. New disposals ship with a knockout plug in the dishwasher inlet that must be removed during installation. If it was missed, the dishwasher can't drain into the disposal. Removing the plug fixes it.
Can I fix a dishwasher that won't drain myself?
Often yes — cleaning the filter and checking the disposal knockout are safe, simple steps. If the drain pump has failed or there's a deep clog, that's a technician repair.