Run an empty Tub Clean cycle
LG WM4000HWA
Region: US | Content version: 2.0.0

Remove residue with the dedicated cycle and the correct placement for your selected cleaner.

MODEL AND MANUAL
Exact model: WM4000HWA
Rinse+Spin button with Control Lock marking; Tub Clean cycle. Compare your supplied manual with MFL71728908 Rev.02_051022.
Manual: MFL71728908 Rev.02_051022
Excludes: WM3400CW; WM4000HBA; WM4080HWA; WM4000HWA with a different control panel or manual instructions

PREPARATION
[ ] Empty the drum completely.
[ ] Read the cleaner label and use only a product intended for washing machines.
[ ] Keep children and pets away from the open drum. Never mix bleach with acids or ammonia.

TOOLS
- Soft dry cloth

MATERIALS
- One compatible washer cleaner; follow its label dose

FULL CHECKLIST
1. 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, 37–38
2. Close 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, 37–38
3. Wait 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, 37–38
4. If 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

STOP CONDITIONS
- 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.

BRANCH CHECKS
Begin with: Is drum cleaning due or a musty smell present?

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.

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.

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.
Follow checklist steps: 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.

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.
Follow checklist steps: 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.

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.
Follow checklist steps: 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.

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.
Follow checklist steps: 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.

RESULT OBSERVATIONS
- The empty cleaning cycle and required rinse finished; residue was checked

YOUR RECORD
Observation date: ____________________

BEFORE
Cleaning trigger and last Tub Clean date: ____________________

AFTER
Cleaner, rinse and remaining odor: ____________________

Additional observations: ____________________
Result / reason for stopping: ____________________
Next action: ____________________

REMINDER
Monthly Tub Clean; 30 days is a calendar reminder approximation. Heavy use may need more frequent cleaning.
Interval: 30 days; basis: manufacturer
Source: lg-manual; p. 37
A calendar reminder is a personal plan, not a record of work completed.

DIAGRAMS
Empty drum for Tub Clean and a separate post-cleaning rinse and drying observation
https://csl-13-appliance-repair.pages.dev/diagrams/lg-drum-care.svg
Original Homekeep artwork. Conceptual component relationships, not a scale drawing or an installation template.

SOURCES
LG WM4000H*A / WM4080H*A Owner’s Manual | MFL71728908 Rev.02_051022 | pp. 5, 31, 37–38
https://media.us.lg.com/m/12df7154cf356724/original/WM4080_2023_Owners-Manual_Washer_Eng.pdf#page=37
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.
https://www.lg.com/us/support/product/lg-WM4000HWA.ABWEUUS
Checked: 2026-10-13. Link only

RELATED TASKS
Trace a musty washer smell: https://csl-13-appliance-repair.pages.dev/tasks/lg-odor/
Wash residue from the dispenser drawer: https://csl-13-appliance-repair.pages.dev/tasks/lg-drawer-clean/

Observations do not certify a physical repair. Follow your matching supplied manual and the stop conditions.
Guide: https://csl-13-appliance-repair.pages.dev/tasks/lg-tub-clean/