{
  "id": "lg-tub-clean",
  "version": "2.0.0",
  "title": "Run an empty Tub Clean cycle",
  "deviceFamily": "washer",
  "modelApplicability": {
    "modelIds": [
      "lg-wm4000hwa"
    ],
    "region": "US",
    "panel": "Rinse+Spin button with Control Lock marking; Tub Clean cycle. Compare your supplied manual with MFL71728908 Rev.02_051022.",
    "manualVersion": "MFL71728908 Rev.02_051022"
  },
  "exclusions": [
    "WM3400CW",
    "WM4000HBA",
    "WM4080HWA",
    "WM4000HWA with a different control panel or manual instructions"
  ],
  "intent": "maintenance",
  "summary": "Remove residue with the dedicated cycle and the correct placement for your selected cleaner.",
  "prerequisites": [
    {
      "text": "Empty the drum completely.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    },
    {
      "text": "Read the cleaner label and use only a product intended for washing machines.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    },
    {
      "text": "Keep children and pets away from the open drum. Never mix bleach with acids or ammonia.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    }
  ],
  "tools": [
    "Soft dry cloth"
  ],
  "materials": [
    "One compatible washer cleaner; follow its label dose"
  ],
  "steps": [
    {
      "id": "step-1",
      "text": "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.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    },
    {
      "id": "step-2",
      "text": "Close the drawer and door. Restore power if it was unplugged, select Tub Clean and press Start/Pause. Keep the drum empty throughout.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    },
    {
      "id": "step-3",
      "text": "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.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    },
    {
      "id": "step-4",
      "text": "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.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    }
  ],
  "checks": [
    {
      "id": "clean-trigger",
      "goal": "Is drum cleaning due or a musty smell present?",
      "question": "Is drum cleaning due or a musty smell present?",
      "instruction": "tcL is a cleaning reminder. The manual recommends monthly Tub Clean and more often under heavy use.",
      "stepIds": [],
      "choices": [
        {
          "label": "No current smell and cleaning is not due",
          "next": "identified",
          "observation": "normal"
        },
        {
          "label": "Cleaning is due, tcL appears or the drum smells musty",
          "next": "empty-drum",
          "observation": "abnormal"
        },
        {
          "label": "I have not checked this yet",
          "next": "ready",
          "observation": "unobserved"
        }
      ],
      "sourceId": "lg-manual",
      "locator": "pp. 37–38, 44"
    },
    {
      "id": "empty-drum",
      "goal": "Is every garment out of the drum?",
      "question": "Is every garment out of the drum?",
      "instruction": "Remove all laundry before adding a cleaner. Keep children and pets away from the empty drum; stop for unsafe damage or leakage.",
      "stepIds": [],
      "choices": [
        {
          "label": "Drum is empty and safe to use",
          "next": "cleaner-placement",
          "observation": "normal"
        },
        {
          "label": "Laundry remains in the drum",
          "next": "ready",
          "observation": "abnormal"
        },
        {
          "label": "I have not checked this yet",
          "next": "ready",
          "observation": "unobserved"
        }
      ],
      "sourceId": "lg-manual",
      "locator": "pp. 4–5, 37"
    },
    {
      "id": "cleaner-placement",
      "goal": "Does the cleaner match its intended compartment?",
      "question": "Does the cleaner match its intended compartment?",
      "instruction": "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.",
      "stepIds": [
        "step-1"
      ],
      "choices": [
        {
          "label": "Product, dose and placement are confirmed",
          "next": "tub-cycle",
          "observation": "normal"
        },
        {
          "label": "Product or compartment does not match",
          "next": "ready",
          "observation": "abnormal"
        },
        {
          "label": "I have not checked the cleaner label",
          "next": "ready",
          "observation": "unobserved"
        }
      ],
      "sourceId": "lg-manual",
      "locator": "pp. 5, 37–38"
    },
    {
      "id": "tub-cycle",
      "goal": "Did the empty Tub Clean cycle finish?",
      "question": "Did the empty Tub Clean cycle finish?",
      "instruction": "Close the drawer and door, select Tub Clean and press Start/Pause. Stop for a leak, unusual burning smell or an error.",
      "stepIds": [
        "step-2"
      ],
      "choices": [
        {
          "label": "The empty cycle finished",
          "next": "cleaner-rinse",
          "observation": "normal"
        },
        {
          "label": "Cycle failed or an unsafe symptom appeared",
          "next": "service",
          "observation": "abnormal"
        },
        {
          "label": "I have not run it or it is still running",
          "next": "ready",
          "observation": "unobserved"
        }
      ],
      "sourceId": "lg-manual",
      "locator": "pp. 37–38"
    },
    {
      "id": "cleaner-rinse",
      "goal": "Has the required rinse after drum cleaner or descaler finished?",
      "question": "Has the required rinse after drum cleaner or descaler finished?",
      "instruction": "Before the next clothes wash, use Power, Rinse+Spin with no wash cycle selected, then Start/Pause. Keep the drum empty.",
      "stepIds": [
        "step-4"
      ],
      "choices": [
        {
          "label": "Rinse+Spin finished",
          "next": "drum-dry",
          "observation": "normal"
        },
        {
          "label": "Rinse failed or cleaner residue remains",
          "next": "service",
          "observation": "abnormal"
        },
        {
          "label": "The rinse is still pending",
          "next": "ready",
          "observation": "unobserved"
        }
      ],
      "sourceId": "lg-manual",
      "locator": "pp. 31, 38"
    },
    {
      "id": "drum-dry",
      "goal": "What remains after the drum is rinsed?",
      "question": "What remains after the drum is rinsed?",
      "instruction": "Wait for motion to stop and let the drum dry only where children and pets cannot enter. Record persistent odor separately from cycle completion.",
      "stepIds": [
        "step-3"
      ],
      "choices": [
        {
          "label": "No visible residue; the drum was checked and left to dry safely",
          "next": "done",
          "observation": "normal"
        },
        {
          "label": "Musty odor remains after the completed cleaning",
          "next": "identified",
          "observation": "abnormal"
        },
        {
          "label": "I have not inspected after rinsing",
          "next": "ready",
          "observation": "unobserved"
        }
      ],
      "sourceId": "lg-manual",
      "locator": "pp. 37–38"
    }
  ],
  "branches": {
    "entry": "clean-trigger",
    "outcomes": {
      "done": {
        "title": "Result recorded",
        "text": "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.",
        "type": "user-maintenance"
      },
      "identified": {
        "title": "Check the remaining cleaning need",
        "text": "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.",
        "type": "issue-located"
      },
      "service": {
        "type": "service-needed",
        "title": "Pause and arrange qualified help",
        "text": "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."
      },
      "ready": {
        "title": "Observation still needed",
        "text": "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.",
        "type": "prepared"
      }
    }
  },
  "outcomeChecks": [
    {
      "text": "The empty cleaning cycle and required rinse finished; residue was checked",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    }
  ],
  "stopConditions": [
    "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."
  ],
  "sources": [
    {
      "id": "lg-manual",
      "title": "LG WM4000H*A / WM4080H*A Owner’s Manual",
      "url": "https://media.us.lg.com/m/12df7154cf356724/original/WM4080_2023_Owners-Manual_Washer_Eng.pdf",
      "version": "MFL71728908 Rev.02_051022",
      "checkedAt": "2026-10-13",
      "purpose": "User maintenance, control operations, observable troubleshooting and safety",
      "reuse": "Copyright LG. Linked reference; original summaries only. No manual illustrations reproduced.",
      "locator": "pp. 5, 31, 37–38",
      "topicPage": 37,
      "pdfPage": 37,
      "pageNumbering": "PDF page number equals printed English page number in these editions."
    },
    {
      "id": "lg-support",
      "title": "LG WM4000HWA product support",
      "url": "https://www.lg.com/us/support/product/lg-WM4000HWA.ABWEUUS",
      "version": "Live US model support page",
      "checkedAt": "2026-10-13",
      "purpose": "US model identity; newer revisions require comparison to supplied manual",
      "reuse": "Link only",
      "locator": "US WM4000HWA identity. Current support listings may contain a newer manual; these steps require MFL71728908 Rev.02_051022."
    }
  ],
  "assets": [
    {
      "id": "lg-drum-care",
      "url": "/diagrams/lg-drum-care.svg",
      "kind": "original schematic",
      "alt": "Empty drum for Tub Clean and a separate post-cleaning rinse and drying observation",
      "license": "Original Homekeep artwork. Conceptual component relationships, not a scale drawing or an installation template.",
      "sourceId": "lg-manual",
      "locator": "pp. 5, 31, 37–38"
    }
  ],
  "relatedIds": [
    "lg-odor",
    "lg-drawer-clean"
  ],
  "family": "odor",
  "diagramId": "lg-drum-care",
  "recordFields": [
    {
      "key": "before-observation",
      "label": "Cleaning trigger and last Tub Clean date",
      "phase": "before",
      "type": "text",
      "placeholder": "Date, tcL or musty smell"
    },
    {
      "key": "after-observation",
      "label": "Cleaner, rinse and remaining odor",
      "phase": "after",
      "type": "text",
      "placeholder": "Product used; rinse finished; odor still present or absent"
    }
  ],
  "maintenance": {
    "intervalDays": 30,
    "basis": "manufacturer",
    "label": "Monthly Tub Clean; 30 days is a calendar reminder approximation. Heavy use may need more frequent cleaning.",
    "sourceId": "lg-manual",
    "locator": "p. 37"
  }
}