LG Washing Machine OPn Error
Applies only to LG washers with the ezDispense automatic dispensing system. LG documents OPn inside its ezDispense block on the front-load list, alongside Ed1–Ed5 and the dcL display — this page covers OPn on its own.
What to check first
- Push the detergent drawer fully in until it is completely inserted — fully home, not nearly.
- Keep the drawer closed while the washer runs: opening it during operation is itself an OPn trigger in LG's definition.
- If OPn persists with the drawer fully seated and left closed, LG directs you to service.
OPn is the simplest code in the ezDispense family: a mechanical report about the drawer itself. Because ezDispense models dose detergent and softener automatically from reservoirs in the drawer, the drawer's position is monitored — run the machine with it short of fully inserted, or open it mid-operation, and the machine reports OPn instead of dosing from an unsealed drawer.
LG documents OPn within its ezDispense block rather than as a standalone entry, and this page follows that: the drawer check below is the family's published guidance for this code. The rest of the family — the Ed pump and communication codes and the dcL Nozzle Clean display — is introduced on the ezDispense family overview, and each code has its own guide linked below.
Safety first
- Unplug the washer before removing the dispenser drawer fully or cleaning deep in the dispenser housing.
- Detergent and softener residue is slippery and an eye irritant: rinse hands after handling the tray, and keep spilled liquid off the floor where it is a slip hazard near a machine you are leaning into.
- Stop condition: stop using the machine and unplug it — and do not run it again until it has been checked — if you smell burning, see smoke, find damaged electrics (a scorched plug, a melted or cut cable), or water is leaking in quantity.
Common causes
The drawer is not completely inserted
The drawer sits nearly home but not fully. LG's definition is precise — operated without the detergent drawer completely inserted — and the last few millimetres are the difference between a sealed dosing drawer and OPn.
The drawer was opened during operation
LG's second named trigger. Opening the drawer mid-cycle interrupts the dosing system, and the machine reports it with the same code.
Step-by-step checks
- Seat the drawer fullyPush the detergent drawer in until it is completely inserted. If you had it out for cleaning, re-seat it squarely and push it home.
- Run a cycle with the drawer left closedStart a normal cycle and do not open the drawer mid-operation. If OPn does not return, drawer position was the whole fault.
When to call a technician
If OPn persists despite the drawer being fully inserted and kept closed, request service. The cause needs further diagnosis. LG's front-load list directs you to request service in this case; quote OPn when booking.
Model differences that matter
| Machine type | What changes |
|---|---|
| ezDispense models | The whole family lives here: OPn for the drawer, Ed1/Ed2 for the detergent pump (fault / open circuit), Ed3/Ed4 for the softener pump (fault / open circuit), Ed5 for PCB communication, dcL for the Nozzle Clean function. |
| Manual-dispenser models | None of these codes apply — there is no automatic dosing system to report them. Sud and FE are the dispenser-adjacent codes on standard models. |
One-page checklist
- Drawer pushed fully home — completely inserted, not nearly
- Cycle run with the drawer left closed throughout
- OPn returned with the drawer seated — service booked with OPn quoted
Official LG references
Questions people ask about OPn
Is OPn a fault or a reminder?
It is a status report with a mechanical fix. LG defines OPn as the washer operated without the detergent drawer completely inserted, or the drawer opened during operation. Seat the drawer fully, leave it closed during the cycle, and OPn should not return.
Can I open the drawer mid-cycle to top up detergent?
On ezDispense models, opening the drawer during operation is one of LG's two OPn triggers — dose before the cycle starts. The reservoirs are sized to be filled between cycles, not during them.
OPn is showing but my drawer looks closed.
Looks closed and completely inserted differ by the last few millimetres, and LG's wording is completely inserted. Push the drawer fully home and run a cycle without opening it; a persistent OPn after that is LG's service case.