Trace a musty washer smell LG WM4000HWA Region: US | Content version: 2.0.0 Separate damp laundry, drawer residue and drum cleaning needs before choosing maintenance. 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 [ ] Finish the cycle, wait for unlocking and remove laundry. [ ] Switch off and unplug for hands-on inspection; keep children and pets away. TOOLS - Soft dry cloth MATERIALS - No cleaner until a separate maintenance task is selected FULL CHECKLIST 1. Remove any damp items left in the washer. Wipe moisture from the door glass and inside of the seal. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 37–40, 49 2. Inspect the dispenser for buildup and use the linked drawer-cleaning task if residue is present. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 37–40, 49 3. Inspect the empty drum for deposits and check when Tub Clean was last run. Use the linked empty-cycle task if cleaning is due. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 37–40, 49 4. Allow the drum to dry with the door open only where children and pets cannot enter. Persistent odor or drainage trouble needs further support. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 37–40, 49 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 the smell musty after laundry is removed? Is the smell musty after laundry is removed? Is the smell musty after laundry is removed? A burning, chemical or gas smell requires stopping use and qualified help. This task is for musty moisture-related odor only. - No musty odor is present -> Next action recorded. The observed condition does not call for further action in this task, or a different task is more appropriate. Keep the observation in your record; do not infer a failed component. - A musty smell remains after unloading -> Continue to: Have damp items and visible door moisture been removed?. - The smell is burning, chemical or otherwise unsafe -> 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 after unloading -> 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. Have damp items and visible door moisture been removed? Have damp items and visible door moisture been removed? Wait for unlocking and motion to stop. Unplug before hands-on inspection, remove damp items and wipe door glass and the inside of the seal. Follow checklist steps: 1 - Laundry removed and accessible moisture wiped -> Continue to: Is residue visible in the dispenser?. - The door is unsafe to open or the seal is 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. - Unloading or wiping is 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. Is residue visible in the dispenser? Is residue visible in the dispenser? Look after power isolation. Note a drawer-cleaning action when buildup is present; do not add cleaners yet. Follow checklist steps: 2 - No dispenser buildup is visible -> Continue to: What do the drum and cleaning history show?. - Buildup is visible; drawer cleaning is noted -> Continue to: What do the drum and cleaning history show?. - I have not inspected the drawer -> 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 do the drum and cleaning history show? What do the drum and cleaning history show? Record visible deposits and the last Tub Clean date. Select the relevant separate maintenance task; never mix products. Follow checklist steps: 3 - Drum looks clear and cleaning is current -> Continue to: Is a safe drying and maintenance action recorded?. - Deposits are visible or cleaning is due -> Continue to: Is a safe drying and maintenance action recorded?. - Drum condition or cleaning history is unknown -> 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 a safe drying and maintenance action recorded? Is a safe drying and maintenance action recorded? Ventilate only with children and pets kept out. Note the selected Tub Clean, seal or drawer task. Persistent odor or drainage trouble needs support. Follow checklist steps: 4 - Moisture, cleaning need and next action are recorded -> Odor care plan recorded. The moisture and residue observations and next care task are saved. Complete the selected maintenance separately, then observe whether the odor returns. - Odor persists after appropriate completed care or drainage is poor -> 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. - No drying or maintenance action is selected 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. RESULT OBSERVATIONS - A moisture or residue source was found and the appropriate maintenance task chosen YOUR RECORD Observation date: ____________________ BEFORE Odor and time damp laundry remained: ____________________ AFTER Moisture, residue and selected next task: ____________________ Additional observations: ____________________ Result / reason for stopping: ____________________ Next action: ____________________ REMINDER Observe after washes and when odor develops; use the separate manufacturer schedules for selected cleaning tasks. Interval: Choose a personal interval; basis: user-selected Source: lg-manual; pp. 37–40, 49 A calendar reminder is a personal plan, not a record of work completed. DIAGRAMS Empty drum, visible deposits and drying observations used to choose appropriate odor maintenance 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. 37–40, 49 https://media.us.lg.com/m/12df7154cf356724/original/WM4080_2023_Owners-Manual_Washer_Eng.pdf#page=49 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 Run an empty Tub Clean cycle: https://csl-13-appliance-repair.pages.dev/tasks/lg-tub-clean/ Wash residue from the dispenser drawer: https://csl-13-appliance-repair.pages.dev/tasks/lg-drawer-clean/ Clean buildup around the door seal: https://csl-13-appliance-repair.pages.dev/tasks/lg-door-seal/ 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-odor/