LG WM4000HWA · User maintenance
Run an empty Tub Clean cycle
Remove residue with the dedicated cycle and the correct placement for your selected cleaner.
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
- Soft dry cloth
Materials
- One compatible washer cleaner; follow its label dose
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.
With power off, place a cleaning tablet in the empty drum; place a liquid drum cleaner in the main dispenser. Remove the liquid cup before a powdered main-compartment cleaner. Follow the product label.
Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 5, 31, 37–38Close the drawer and door. Restore power if it was unplugged, select Tub Clean and press Start/Pause. Keep the drum empty throughout.
Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 5, 31, 37–38Wait for the cycle to finish and motion to stop. Let the drum dry with the door open only where children and pets cannot enter.
Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 5, 31, 37–38If a descaler or drum cleaner was used, rinse before the next clothes wash: turn on without selecting a cycle, press Rinse+Spin, then Start/Pause.
Source: LG WM4000H*A / WM4080H*A Owner’s Manual · pp. 5, 31, 37–38
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 drum cleaning due or a musty smell present?”. Choose only what you observed. An unobserved condition is its own answer.
Is drum cleaning due or a musty smell present?
Is drum cleaning due or a musty smell present?
tcL is a cleaning reminder. The manual recommends monthly Tub Clean and more often under heavy use.
- No current smell and cleaning is not due
Check the remaining cleaning need — If cleaning is not due, keep your usual reminder. If odor remains after a completed clean, inspect the seal and drawer. The manual describes weekly Tub Clean for three consecutive weeks when mildew or musty odor already exists; seek help if the smell or drainage problem persists. - Cleaning is due, tcL appears or the drum smells musty
Continue to Is every garment out of the drum?. - 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 · pp. 37–38, 44
Is every garment out of the drum?
Is every garment out of the drum?
Remove all laundry before adding a cleaner. Keep children and pets away from the empty drum; stop for unsafe damage or leakage.
- Drum is empty and safe to use
Continue to Does the cleaner match its intended compartment?. - Laundry remains in the drum
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. - 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 · pp. 4–5, 37
Does the cleaner match its intended compartment?
Does the cleaner match its intended compartment?
Use one compatible product and its label dose. Put tablets in the drum; use the main compartment for a drum cleaner and remove the liquid cup for powder. Never combine products.
Steps for this check: 1.
- Product, dose and placement are confirmed
Continue to Did the empty Tub Clean cycle finish?. - Product or compartment does not match
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. - I have not checked the cleaner label
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. 5, 37–38
Did the empty Tub Clean cycle finish?
Did the empty Tub Clean cycle finish?
Close the drawer and door, select Tub Clean and press Start/Pause. Stop for a leak, unusual burning smell or an error.
Steps for this check: 2.
- The empty cycle finished
Continue to Has the required rinse after drum cleaner or descaler finished?. - Cycle failed or an unsafe symptom appeared
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 run it or it is still running
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. 37–38
Has the required rinse after drum cleaner or descaler finished?
Has the required rinse after drum cleaner or descaler finished?
Before the next clothes wash, use Power, Rinse+Spin with no wash cycle selected, then Start/Pause. Keep the drum empty.
Steps for this check: 4.
- Rinse+Spin finished
Continue to What remains after the drum is rinsed?. - Rinse failed or cleaner residue remains
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 rinse is still pending
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. 31, 38
What remains after the drum is rinsed?
What remains after the drum is rinsed?
Wait for motion to stop and let the drum dry only where children and pets cannot enter. Record persistent odor separately from cycle completion.
Steps for this check: 3.
- No visible residue; the drum was checked and left to dry safely
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. - Musty odor remains after the completed cleaning
Check the remaining cleaning need — If cleaning is not due, keep your usual reminder. If odor remains after a completed clean, inspect the seal and drawer. The manual describes weekly Tub Clean for three consecutive weeks when mildew or musty odor already exists; seek help if the smell or drainage problem persists. - I have not inspected after rinsing
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. 37–38
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.
Check the remaining cleaning need
If cleaning is not due, keep your usual reminder. If odor remains after a completed clean, inspect the seal and drawer. The manual describes weekly Tub Clean for three consecutive weeks when mildew or musty odor already exists; seek help if the smell or drainage problem persists.
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
- The empty cleaning cycle and required rinse finished; residue was checked
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.
Current result
No result recorded.
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
Monthly Tub Clean; 30 days is a calendar reminder approximation. Heavy use may need more frequent cleaning.
LG WM4000H*A / WM4080H*A Owner’s Manual · p. 37
The starting interval below comes from the cited manual. Review it against your usage and supplied manual. 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. 5, 31, 37–38
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.