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LG washer OE, E03 or E21 code: the washer cannot drain the used water

OE, E03 or E21 means the washer cannot drain the used water. Let hot water cool, use the emergency drain tube if provided, and clean the pump filter.

Direct answer

On a supported LG washer, OE, E03 or E21 means the washer cannot drain the used water. Let hot water cool, use the emergency drain tube if provided, and clean the pump filter. Then straighten the drain hose and verify it is not frozen, clogged or installed too high.

What this covers

  • LG washers displaying OE, E03 or E21
  • The code and product type exactly match the official source
  • Customer-accessible checks before component replacement

What it does not cover

  • ×A similar code on another manufacturer or appliance type
  • ×Codes omitted from the exact model manual
  • ×Internal wiring, sealed-panel or live-electrical repair
Try in this order0 of 4 completed

  1. Confirm OE, E03 or E21 on the exact model

    Reversible

    Photograph the complete display, record the model tag and note the cycle stage. Similar-looking codes can mean different things on another product line.

  2. Check the condition named by the code

    Reversible

    Let hot water cool, use the emergency drain tube if provided, and clean the pump filter.

  3. Correct the remaining user-serviceable cause

    Reversible

    Straighten the drain hose and verify it is not frozen, clogged or installed too high.

  4. Run one controlled verification

    Reversible

    Run Spin Only or Drain and confirm the tub empties promptly. A clear hose and filter with a silent, noisy or nonworking pump requires service.

Evidence ledger

Sources behind this answer

Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.

01
LG SupportLG front-load washer OE error

Official LG OE drain-error causes and checks.

Exact questions

Common follow-ups

What does OE, E03 or E21 mean on a LG washer?+

It means the washer cannot drain the used water.

Can I clear OE, E03 or E21 by resetting the washer?+

A restart may clear a stored display only after the underlying condition is corrected. Repeatedly resetting without correcting the cause is not a repair.

When is professional service appropriate?+

A clear hose and filter with a silent, noisy or nonworking pump requires service.

Change recordAug. 17, 2026 — Published the exact OE, E03 or E21 meaning, customer-safe checks and service boundary from LG Support.
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