DIY Error Codes

LG dishwasher error OE

Drainage problem

Check the drain hose, clean the air gap or disposal, then clean the filters.

Disconnect power before cleaning. Mind the filter's sharp edges.
Why
LG (p.5): "Disconnect this appliance from the power supply before cleaning and attempting any user maintenance. Turning the controls to the OFF position does not disconnect this appliance from the power supply." "Do not repair or replace any part of the appliance. All repairs and servicing must be performed by qualified service personnel unless specifically recommended in this Owner's Manual. Use only authorized factory parts." LG (p.43): "Be cautious of sharp edges when handling the stainless steel filter."

Fix it step by step

Step 1 of 4

  1. Check the drain hose

    • 5 min
    • None
    • DIY

    Clogged, kinked or frozen?

    Why & details

    Check the drain hose.

    LG chart, OE (p.48): "Check for a clogged, kinked or frozen water drain hose."

    Did the code clear?

  2. Clean the air gap or disposal

    • 10 min
    • Toothpick or brush
    • DIY

    LG lists a clogged air gap or disposal.

    Why & details

    Clean the air gap or disposal.

    LG chart, OE (p.48): "Clean air gap or disposal." LG, Cleaning the Air Gap (p.43): turn off the dishwasher, remove the air gap cover and the plastic cap underneath it, "Clean out any debris with a toothpick or brush.", then replace the cap and cover.

    Did the code clear?

  3. Clean the filters

    • 15 min
    • Soft brush
    • Caution

    Safety: Disconnect power before cleaning. Mind the filter's sharp edges. LG (p.43): "Be cautious of sharp edges when handling the stainless steel filter."

    Remove, brush under running water, reinstall until it clicks.

    Why & details

    Clean the filters.

    LG, Cleaning the Filters (p.43): remove the lower rack and position the bottom spray arm; "Turn the inner filter counter-clockwise and take out the assembled inner filter and stainless steel filter." Check the sump opening and remove any foreign materials. "Clean the filters with a soft brush under running water." Reassemble and secure them "by turning the inner filter clockwise until it clicks into place."

    Did the code clear?

  4. Call for service

    • Decision
    • None
    • Pro decision

    If OE returns.

    Why & details

    Call for service.

    LG says all repairs and servicing must be performed by qualified service personnel unless specifically recommended in the Owner's Manual (p.5).

    Still showing OE?Need a pro → call a pro

Code cleared. Nice work.

Watch the display for a day to make sure it stays clear.

Back to top

Fixed after any step? Watch the display for a day to make sure it stays clear. Still OE after step 4? call a pro.

What OE means

The dishwasher is not draining. LG lists the drain hose, a clogged air gap or disposal, and clogged filters.

More detail
LG's Error Messages chart (p.48) lists OE as "Drainage Problem." with three causes: the drain hose ("Check for a clogged, kinked or frozen water drain hose."), "Air gap or disposal is clogged." and "Filters are clogged."

5-minute checks

Full answer & models

LG dishwasher OE is a drainage problem. Check the drain hose, clean the air gap or disposal, and clean the filters.

Applies to: LDT779#**LDP679#**LDP567#**LDT566#**LDPN676**
Also searched as: LG dishwasher OE, LG dishwasher OE code, LG dishwasher error code OE, LG dishwasher not draining code

Call a pro if…

  • OE returns after the hose, air gap and filter checks.
  • The drain hose is frozen inside a wall or cabinet (a plumber).
  • The disposal or sink drain is blocked beyond the dishwasher.

FAQ

What does OE mean on an LG dishwasher?

Drainage problem. LG lists a clogged, kinked or frozen drain hose, a clogged air gap or disposal, and clogged filters.

How often should I clean the filter?

LG says: "For best wash performance, clean the filter after each load." In hard-water areas, at least once a month with a soft brush (p.43).

Is OE the same as bE?

No. LG lists bE separately, for oversudsing caused by improper detergent (p.48).

Source: LG Dishwasher Owner's Manual LDT779/LDP679/LDP567/LDT566/LDPN676 (MFL71917404): Error Messages p.48, Cleaning the Filters and Air Gap p.43, Safety p.5. Written by the DIY Error Codes team. Updated 2026-10-17. DIY Error Codes is independent and not affiliated with or endorsed by LG.