Clean the drain pump filter LG WM4000HWA Region: US | Content version: 2.0.0 Drain residual water before opening the filter, then clean and refit the user-accessible parts. 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 or stop the cycle; drum must be motionless. [ ] Switch off and unplug the washer. Allow any water to cool; do not touch hot drainage water. [ ] Prepare to contain residual water before loosening the filter. TOOLS - Shallow container - Bucket - Soft cloth MATERIALS - Water for cleaning FULL CHECKLIST 1. Open the small drain-filter access cover. Place the container at the emergency drain hose. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 5–6, 40 2. Unclip the small drain hose and remove its plug. Collect the residual water; empty the container as needed. Do not open the filter while water remains uncontained. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 5–6, 40 3. Turn the filter counterclockwise to remove it. Clear accessible debris from the filter and its opening; do not reach into the pump mechanism. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 5–6, 40 4. Replace the small hose plug and secure the hose in its clip. Insert the filter and turn it clockwise to seat it. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 5–6, 40 5. Close the access cover. Only after reassembly, dry floor and hands, restore power and observe a normal drain for leakage. Stop if water escapes. Source: LG WM4000H*A / WM4080H*A Owner’s Manual; pp. 5–6, 40 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: What prompted the drain-filter check? What prompted the drain-filter check? What prompted the drain-filter check? Use the last drain observation or your chosen periodic cleaning reminder. Stop for an active leak or unsafe water near power. - No drainage symptom and no cleaning planned -> 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. - Slow drainage or filter cleaning is planned -> Continue to: Is the washer unplugged and the drain water cool?. - 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 the washer unplugged and the drain water cool? Is the washer unplugged and the drain water cool? Finish or stop the cycle, wait for motion to stop and allow hot water to cool. Have a shallow container ready before opening the small access cover. Follow checklist steps: 1 - Unplugged, cool and ready to contain water -> Continue to: Has residual water drained through the small hose?. - Water is escaping or the area is 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. - Cooling or unplugging 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. Has residual water drained through the small hose? Has residual water drained through the small hose? Drain into the container before loosening the large filter. Replug the small hose when emptying the container; repeat until the residual flow stops. Follow checklist steps: 2 - Residual water is contained and flow has stopped -> Continue to: Can the filter be removed and cleaned without damage?. - I cannot contain the flow or drain safely -> 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 drained the residual water -> 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. Can the filter be removed and cleaned without damage? Can the filter be removed and cleaned without damage? Turn counterclockwise only after residual drainage. Clear accessible debris; keep fingers and tools out of the pump mechanism. Follow checklist steps: 3 - Filter and opening are clear and intact -> Continue to: Are the hose plug, hose clip and filter all secure?. - Filter is stuck, damaged or unsafe to handle -> 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 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. Are the hose plug, hose clip and filter all secure? Are the hose plug, hose clip and filter all secure? Refit the small hose plug, clip the hose, seat the filter clockwise and close the cover before restoring power. Follow checklist steps: 4 - All user-accessible parts are secure -> Continue to: What happened on the next normal drain?. - A part will not seat or 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. - Reassembly is not complete -> 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 happened on the next normal drain? What happened on the next normal drain? Observe only with the washer fully assembled, dry hands and a dry floor. Stop immediately for leakage. Follow checklist steps: 5 - Drain completed and the filter area stayed dry -> 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. - Drainage is still poor or water escapes -> 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 observed another drain -> 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 - Water drains and the refitted filter and hose plug do not leak YOUR RECORD Observation date: ____________________ BEFORE Drainage before cleaning: ____________________ AFTER Debris and drain result after refitting: ____________________ Additional observations: ____________________ Result / reason for stopping: ____________________ Next action: ____________________ REMINDER Periodic cleaning; choose a reminder based on use. The manual gives no fixed interval. Interval: Choose a personal interval; basis: user-selected Source: lg-manual; p. 40 A calendar reminder is a personal plan, not a record of work completed. DIAGRAMS Small residual drain hose and plug distinguished from the larger removable drain pump filter https://csl-13-appliance-repair.pages.dev/diagrams/lg-drain-filter.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. 5–6, 40 https://media.us.lg.com/m/12df7154cf356724/original/WM4080_2023_Owners-Manual_Washer_Eng.pdf#page=40 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 Check an OE drainage message: https://csl-13-appliance-repair.pages.dev/tasks/lg-oe-drain/ 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-drain-filter/