Why is my LG dishwasher not draining?

Most drain failures come from a blocked sump, obstructed drain pump, or a kinked drain hose. LG’s narrow drain path makes small debris more impactful.

Why am I getting an OE error on my LG dishwasher?

OE errors typically occur when the drain pump cannot move water. Clear the filter, inspect the sump, and check the drain hose for restrictions.

Can I repair the drain pump instead of replacing it?

Yes—if the impeller spins freely and debris can be cleared, cleaning often restores function. Replacement is needed if torque loss or coil failure is present.

Is it safe to run an LG dishwasher that is not draining?

No. Continued operation risks triggering leak protection or overflowing into the pan. Avoid use until the issue is resolved.

LG Dishwashers Not Draining: Causes, Fixes, and What to Check First

Most drainage complaints on LG units trace back to a restricted drain path or a weak pump. Repair shops commonly see food debris wrapped around the pump impeller or a kinked discharge hose behind the machine. LG’s circulation system is compact, so even a small obstruction can slow or stop water movement. This article is based on technician input, teardown findings, owner reports, and parts supplier data.

Symptom	Likely Cause	Next Step
Standing water after cycle	Blocked pump or hose	Check filter and sump, inspect hose
OE error	Poor drainage or level sensor issue	Clear blockage, test pump
Weak drain sound	Impeller obstruction	Open pump housing and clear debris
Water drains sometimes but not always	Hose height or partial restriction	Verify proper high loop, inspect kinks

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Early symptoms owners usually notice

Some units leave a shallow pool of water under the filter assembly. Others finish the cycle normally but kick out a draining sound that seems weaker than usual. Owners on forums report that the machine may clear water early in the cycle but fail on the final drain. If the pump is struggling, the sound becomes uneven or intermittent.
A few LG models show OE or sometimes AE errors when the level sensor detects standing water.

Think you have a different issue? Learn about other common LG Dishwasher issues here.

What to check first

Start with the filter system. Lift the mesh assembly and inspect the sump for pieces of plastic wrap, labels, or detergent pods that never dissolved fully. These items show up often.
Next, verify that the drain hose is not kinked behind the unit. LG machines are sensitive to hose height and bends. Make sure the hose is secured to the sink drain or disposer with a proper high loop.
If the kitchen sink backs up easily, clear that first. A clogged sink drain can stop the dishwasher from emptying even if the pump is fine.

Diagnostic steps

Pull the lower racks and run a short cycle. Listen during drain. A healthy LG drain pump has a steady, even hum. If the pump buzzes loudly or runs with a pulsing tone, debris may be caught in the impeller.
Disconnect power, remove the lower panels, and access the pump housing. In several units I have opened, the impeller cavity was packed with seeds, broken glass, or pasta fragments. Rotate the impeller by hand. It should move freely.
Check the air gap if your installation has one. Many slow-drain issues turn out to be an air gap cap packed with grease.

If more advanced diagnostics are needed, check out the manufacturer support page:
https://www.lg.com/us/support

Part failures that trigger this problem

Drain pumps do wear out. Parts suppliers note that older LG pumps often lose torque rather than fail suddenly, which leads to inconsistent draining. A failing level sensor can also confuse the control board and stop the machine early, though this is far less common.
A crushed hose or a blocked check valve in the sump can also cause symptoms that look like pump failure.

Cost expectations

A drain pump for most LG dishwashers runs roughly 45 to 90 dollars for the part. Labor typically ranges from 90 to 160 dollars depending on region and access.
If the drain hose needs replacement, expect about 15 to 35 dollars for the part.
Most blockages can be cleared without replacing anything, making this one of the cheaper dishwasher repairs.

See the full repair cost guide here.

Preventive tips

Rinse heavy debris from plates, especially hard seeds and broken edges of plastic containers.
Run the tub cleaning cycle monthly.
Make sure the sink drain flows freely before running the machine.
Avoid pushing the dishwasher too far back into a tight cabinet cavity, since it can pinch the hose.

See our lifespan guide for LG dishwashers to learn how many more years you should get out of your unit.

FAQ

Why does this happen more often on LG units?
The drain path is narrow and the pump is compact, so small debris can have an outsized impact.

Can the pump be cleaned instead of replaced?
If the impeller spins freely and the motor coil reads correctly, cleaning often restores function.

Is this safe to keep using temporarily?
If the machine is not draining at all, avoid running it. Some models will overflow into the pan and trigger leak protection.

Disclaimer:
This guide is for general informational purposes only and does not substitute for professional diagnosis or repair. Always disconnect power and follow manufacturer instructions before inspecting or servicing any appliance. If a repair involves wiring, internal components, gas connections, sealed systems, or any procedure you are not fully qualified to perform, contact a licensed technician. The author and site are not responsible for injury, damage, or loss resulting from DIY repairs.