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Water supply & filling

LG WM4000HWA · Observable checks

Check an IE inlet error from outside

Check supply valves, visible hoses and household flow without disconnecting plumbing.

US model · Manual MFL71728908 Rev.02_051022 · Guide 2.0.0

01 / Match your appliance

Confirm your model and manual

Rinse+Spin button with Control Lock marking; Tub Clean cycle. Compare your supplied manual with MFL71728908 Rev.02_051022.

Covered manual: MFL71728908 Rev.02_051022. Excludes WM3400CW; WM4000HBA; WM4080HWA; WM4000HWA with a different control panel or manual instructions.

02 / Get ready

Preparation

Confirm each item before you follow the guided checks.

Tools

  • No tools needed

Materials

  • No materials needed

03 / Follow what you observe

Your next check

Confirm your model, panel, manual and preparation to begin.

The full checklist

Read the sequence before starting. Follow each step only when its preparation and branch conditions are met.

  1. Check that the accessible hot and cold supply faucets are fully open. Do not force a stuck valve.

    Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 43

  2. Look along visible inlet hoses for kinks, pinching or crushing. Do not pull the machine or alter a connection to reach them.

    Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 43

  3. Check water flow at another household faucet. Low household flow points to a plumbing issue; contact a plumber.

    Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 43

  4. If household flow and external conditions are normal but IE remains, arrange support. Inlet-screen cleaning requires a separate water-isolation procedure, which this checklist does not perform.

    Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 43

When to stop

  • Smoke, a burning smell, damaged wiring, standing water near power, or an active leak: stop using the appliance. Disconnect power only from a safe, dry location and arrange qualified service.
  • Stop if a part is damaged, jammed, sharp, inaccessible, or does not match your manual. Do not force parts or remove a cabinet panel.
Every check and possible next step

Start at “Is IE displayed or is filling absent?”. Choose only what you observed. An unobserved condition is its own answer.

Is IE displayed or is filling absent?

Is IE displayed or is filling absent?

A fill message is an observation, not a valve diagnosis. Inspect from a dry position with the washer assembled.

  • Filling is normal and IE is absent
    Choose the next inlet check — Normal filling needs no action here. If filling remains poor after the external checks, inlet screens are one possible user-maintenance check under a separate isolation procedure. A persistent IE message does not establish that a valve has failed.
  • IE appears or filling is absent
    Continue to Are both accessible water faucets fully open?.
  • I have not checked this yet
    Observation still needed — Your notes are saved. The missing observation is not evidence of a fault or a completed action. Complete only the steps you can perform safely, or ask for help.

LG WM4000H*A / WM4080H*A Owner’s Manual · p. 43

Are both accessible water faucets fully open?

Are both accessible water faucets fully open?

Open only an intact, freely moving faucet. Leave stuck valves and inaccessible connections for a plumber or installer.

Steps for this check: 1.

  • Both are open, or an ordinary closed faucet was opened
    Continue to Do the visible inlet hoses have a clear route?.
  • A valve is stuck, leaking or inaccessible
    Pause and arrange qualified help — Keep the appliance out of use if a safety concern remains. Give the technician the exact model, the visible symptom and any displayed code. Do not open the cabinet or make electrical measurements.
  • I cannot confirm the faucet positions
    Observation still needed — Your notes are saved. The missing observation is not evidence of a fault or a completed action. Complete only the steps you can perform safely, or ask for help.

LG WM4000H*A / WM4080H*A Owner’s Manual · p. 43

Do the visible inlet hoses have a clear route?

Do the visible inlet hoses have a clear route?

Check without moving the washer or disconnecting a hose. Note kinking, crushing and any leak-limiting hose label.

Steps for this check: 2.

  • No visible kink or crushing
    Continue to Is water flow at another household faucet normal?.
  • Hose is kinked, crushed or damaged
    Pause and arrange qualified help — Keep the appliance out of use if a safety concern remains. Give the technician the exact model, the visible symptom and any displayed code. Do not open the cabinet or make electrical measurements.
  • The route is not visible
    Observation still needed — Your notes are saved. The missing observation is not evidence of a fault or a completed action. Complete only the steps you can perform safely, or ask for help.

LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 12, 43

Is water flow at another household faucet normal?

Is water flow at another household faucet normal?

Use a normal household faucet only. Low household flow calls for a plumbing assessment.

Steps for this check: 3.

  • Household flow appears normal
    Continue to Does the next normal fill complete?.
  • Household flow is unusually weak or absent
    Pause and arrange qualified help — Keep the appliance out of use if a safety concern remains. Give the technician the exact model, the visible symptom and any displayed code. Do not open the cabinet or make electrical measurements.
  • I have not checked another faucet
    Observation still needed — Your notes are saved. The missing observation is not evidence of a fault or a completed action. Complete only the steps you can perform safely, or ask for help.

LG WM4000H*A / WM4080H*A Owner’s Manual · p. 43

Does the next normal fill complete?

Does the next normal fill complete?

If IE remains with normal external conditions, choose the separate inlet-screen task only when both supplies and power can be isolated safely. Otherwise request service.

Steps for this check: 4.

  • Filling resumes without IE
    Result recorded — You recorded the task result from your own observation. Keep the before and after notes and recheck during normal use. This record does not certify the appliance condition.
  • IE or poor filling remains
    Choose the next inlet check — Normal filling needs no action here. If filling remains poor after the external checks, inlet screens are one possible user-maintenance check under a separate isolation procedure. A persistent IE message does not establish that a valve has failed.
  • No new fill has been observed
    Observation still needed — Your notes are saved. The missing observation is not evidence of a fault or a completed action. Complete only the steps you can perform safely, or ask for help.

LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 39, 43

Possible results

Result recorded

You recorded the task result from your own observation. Keep the before and after notes and recheck during normal use. This record does not certify the appliance condition.

Choose the next inlet check

Normal filling needs no action here. If filling remains poor after the external checks, inlet screens are one possible user-maintenance check under a separate isolation procedure. A persistent IE message does not establish that a valve has failed.

Pause and arrange qualified help

Keep the appliance out of use if a safety concern remains. Give the technician the exact model, the visible symptom and any displayed code. Do not open the cabinet or make electrical measurements.

Observation still needed

Your notes are saved. The missing observation is not evidence of a fault or a completed action. Complete only the steps you can perform safely, or ask for help.

Check the result

  • An external restriction is identified, or filling resumes after opening the supply

A record you can return to

Your observations

Record what you saw before and after. Leave a field blank when you have not checked it. These entries stay in this browser.

Before the task
After the task

Current result

Summary to share with support

Review this summary before sharing it. A saved observation does not confirm a physical repair.

No observations recorded yet. Complete the checks or add the information you can safely observe.
Previous records on this browser
  • No previous records saved.

Plan the next reminder

Use when IE appears or filling changes; no scheduled diagnostic interval.

LG WM4000H*A / WM4080H*A Owner’s Manual · p. 43

No fixed manufacturer interval is supplied for this task. Choose a personal review interval if useful. A calendar reminder is a personal plan; it does not mark any work as completed.

Sources and fit

  • LG WM4000H*A / WM4080H*A Owner’s Manual — MFL71728908 Rev.02_051022, pp. 43

    Checked 2026-10-13. Copyright LG. Linked reference; original summaries only. No manual illustrations reproduced.

  • LG WM4000HWA product support — Live US model support page, US WM4000HWA identity. Current support listings may contain a newer manual; these steps require MFL71728908 Rev.02_051022.

    Checked 2026-10-13. Link only

This independent checklist summarizes the listed references. Use your appliance’s supplied manual if it differs.

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