LG Washer OPn Error — Dispenser Not Fully Closed Fix

What it means

LG washer OPn error means the dispenser drawer is not fully closed — LG's 'dispenser is not fully closed' code, mostly seen on LG WashTowers and ezDispense models.
The dispenser door must be flush with the front of the washer for the cycle to start; OPn appears when the sensor doesn't detect close.

Affected Models

LG Front Load Washer
LG Top Load Washer
LG WashTower (combined washer + dryer)
LG TurboWash Washer
LG TwinWash Washer

Common Causes

Dispenser drawer not pushed all the way in
Detergent crust on the drawer rails preventing close
Detergent or fabric softener residue blocking the latch
Dispenser sensor faulty
ezDispense bulk reservoir cap not seated correctly

How to Fix It

Push the drawer firmly closed.

Push the dispenser drawer in until you feel and hear a click.
The front face should be flush with the rest of the washer's front panel — no protrusion.
OPn clears immediately when the sensor detects close.
Clean detergent crust from the rails.

Pull the drawer all the way out (most LG drawers have a release lever or latch).
Wipe the rails inside the housing and the drawer itself with a damp cloth.
Detergent and fabric softener residue builds up over months and prevents clean close.
Check the bulk reservoir (ezDispense models).

On LG ezDispense models, also check the bulk detergent reservoir cap.
Make sure it's screwed on tight and not preventing the drawer from sitting flush.
A loose cap can cause OPn even when the drawer itself is fully shut.
Inspect the dispenser sensor.

If the drawer is fully closed, clean, and OPn still appears, the dispenser sensor (usually a small switch behind the drawer housing) may have failed.
This is a technician-level repair but rare — most OPn cases clear with a firm close and a clean.

When to Call a Professional

OPn is almost always an owner fix — push the drawer firmly closed.
If the drawer is fully shut and OPn persists, clean the rails and check the sensor; rarely needs a technician.

Frequently Asked Questions

Why does my LG washer show OPn even after I push the drawer closed?

Two common reasons.
First — detergent crust on the drawer rails prevents the drawer sitting fully flush; you can push it 'closed' but the sensor still sees a small gap.
Pull the drawer all the way out and clean the rails thoroughly.
Second — the dispenser sensor itself has failed and isn't seeing close even when the drawer is properly seated.
Try the cleaning approach first; if OPn persists with a spotlessly clean drawer that pushes flush, the sensor needs technician replacement.