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OWNER'S MANUAL
WASHING MACHINE
Read this owner's manual thoroughly before operating the
appliance and keep it handy for reference at all times.
ENGLISH
WM4000H*A / WM4080H*A
www.lg.com
MFL71728908
Copyright © 2020-2022 LG Electronics Inc. All Rights Reserved.
Rev.02_051022

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Table of Contents
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Summarization of Contents

Important Safety Instructions
Safety Messages
Explains safety alert symbols, WARNING, and CAUTION statements for user safety.
Warning Statements
Lists precautions to reduce risks like explosion, fire, death, electric shock, scalding, or injury.
Installation Safety Precautions
Installation Safety
Safety guidelines for installing the washer, including grounding and handling.
Operation Safety
Safety measures for operating the washer, covering electrical, chemical, and child safety.
Maintenance and Grounding Safety
Safety advice for cleaning, servicing, and proper grounding of the appliance.
Caution Statements
Lists precautions to reduce minor injury, malfunction, or product damage.
Product Overview
Product Features
Describes the main components and features of the washing machine with diagrams.
Included Accessories
Lists and illustrates the accessories that come with the washer.
Required and Optional Accessories
Lists accessories sold separately, like pedestals and stacking kits.
Product Specifications
Provides technical details like dimensions, weight, and electrical requirements.
Installation Guide
Before Installing
Introduces the installation process and provides an overview.
Installation Overview
Provides a step-by-step visual guide to the installation process.
Tools Needed
Lists the necessary tools for installing the washing machine.
Choosing the Proper Location
Guidelines for selecting a suitable installation site, considering space and flooring.
Power Outlet Requirements
Details requirements for the electrical outlet and connection.
Flooring Recommendations
Recommendations for floor stability and type to minimize vibration and noise.
Floor Installation Clearances
Specifies required clearances around the washer for airflow and hose connections.
Unpacking Shipping Material
Instructions on how to safely remove shipping materials from the washer.
Removing Shipping Material
Step-by-step guide to remove shipping bolts and hole caps.
Connecting Water Inlet Hoses
Instructions for connecting water supply hoses, including precautions.
Connecting the Drain Hose
Guidance on connecting the drain hose to a standpipe or laundry tub.
Using a Standpipe to Drain
Specific steps for draining the washer into a standpipe.
Using the Laundry Tub to Drain
Instructions for draining the washer into a laundry tub.
Leveling the Washer
Explains the importance and method of leveling the appliance for stability.
Adjusting Leveling Feet
Detailed steps on how to adjust the leveling feet for proper stability.
Using Non-Skid Pads
Guidance on using non-skid pads to reduce vibration and noise.
Final Installation Check
Steps to ensure the washer is correctly installed and ready for use.
Connecting to the Power Supply
Instructions for plugging the washer into a grounded outlet.
Testing the Washer
Procedure for running a test cycle to verify proper installation.
Operation Guide
Before Use
Initial steps and safety warnings before operating the washer.
Operation Overview
A general guide to starting and running a wash cycle.
End of Cycle
Actions to take when the wash cycle is finished.
Sorting Laundry
Guidelines for grouping clothes by color, soil level, fabric type, and lint.
Fabric Care Labels
How to interpret clothing care labels and adjust settings accordingly.
Loading the Washer
Best practices for loading clothes into the drum for optimal cleaning.
Bulky Items Washing
Specific advice for washing large items like blankets and comforters.
Small Items Washing
Tips for washing small items, including using mesh bags.
Adding Cleaning Products
Guidance on using HE detergents and their benefits.
Pre-wash Detergent Compartment
How to use the pre-wash compartment with HE detergent.
Main Wash Detergent Compartment
Instructions for using the main wash compartment with liquid or powder detergent.
Liquid Bleach Compartment
How to use the bleach dispenser safely and effectively.
Fabric Softener Compartment
Instructions for using the fabric softener dispenser.
Control Panel Features
Overview of the buttons and display on the control panel.
Power On/Off Button
How to turn the washer on and off.
Cycle Selector Knob
How to choose a wash cycle using the knob.
Start/Pause Button
How to start, pause, or cancel a wash cycle.
Cycle Modifier Buttons
Buttons used to adjust wash temp, spin speed, and soil level.
Time and Status Display
Information about the display showing cycle status and time.
Option and Extra Function Buttons
Buttons for selecting additional cycle options and special functions.
Cycle Status Indicators
Explanation of the LEDs indicating wash cycle stages.
Estimated Time Remaining
How the display shows the estimated time for a cycle.
AI DD Indicator
Lights up when AI DD provides optimal drum rotation actions.
Door Lock Indicator
Indicates when the door is locked during a cycle.
Wi-Fi Indicator
Shows when the washer is connected to a Wi-Fi network.
Remote Start Indicator
Lights up when the Remote Start feature is activated.
Wash Cycles Overview
General introduction to selecting wash cycles for best results.
Cycle Guide
How to select cycles and interpret indicators.
Normal Cycle
Details on using the Normal wash cycle for everyday laundry.
Heavy Duty Cycle
Information on the Heavy Duty cycle for heavily soiled items.
Bedding Cycle
Guidance for washing bulky bedding items.
Sanitary Cycle
Details on the Sanitary cycle for high-temperature cleaning.
Allergiene™ Cycle
Information on the Allergiene cycle for reducing allergens.
Tub Clean Cycle
Instructions for using the Tub Clean cycle to clean the washer.
Bright Whites™ Cycle
Details on the Bright Whites cycle for white items.
Delicates Cycle
How to wash delicate fabrics safely.
Perm. Press Cycle
Use of the Perm. Press cycle to minimize wrinkles.
Towels Cycle
Guidance for washing towels, shirts, and jeans.
Speed Wash Cycle
Information on the Speed Wash cycle for quick cleaning of small loads.
Downloaded (Small Load) Cycle
Using the Downloaded cycle for specialized or small loads.
Available Options
Notes on options like Delay Wash, Extra Rinse, Add Item, Steam, Cold Wash.
Cycle Modifiers
Explains how to adjust settings like temperature, spin, and soil level.
Temperature Settings
How to select wash and rinse temperatures.
Spin Speed Adjustment
How to adjust spin speed to extract water from clothes.
Soil Level Adjustment
How to adjust soil level to modify cycle times and actions.
Options and Extra Functions
How to select additional cycle options for customization.
Steam Option
Using the Steam option for superior cleaning performance.
Fresh Care Function
Using Fresh Care to prevent wrinkles by tumbling clothes after the cycle.
Using the Pre-wash Option
Adding a pre-wash for heavily soiled or stained clothing.
Remote Start Function
Using a smartphone to control the washer remotely.
Delay Wash Function
How to set a delay for the start of the wash cycle.
Turbo Wash™ Option
Reduces cycle time while maintaining wash performance.
Cold Wash Option
Saves energy using cooler water; may increase cycle times.
Extra Rinse Option
Adds an extra rinse to remove detergent or bleach residue.
Rinse+Spin Function
Selects rinse and spin for a load separately.
Control Lock Function
Disables controls to prevent children from changing settings.
Locking/Unlocking Control Panel
How to activate or deactivate the Control Lock feature.
Signal Tone Adjustment
Turns the melody and button tones on or off.
Spin Only Function
Spins clothes and drains water from the tub.
Smart Functions
Using LG ThinQ Application
How the LG ThinQ app allows smartphone communication with the appliance.
LG ThinQ Application Features
Lists app features like Remote Start, Downloaded cycles, Energy Monitoring.
Before Using LG ThinQ Application
Steps to prepare for connecting the app, including Wi-Fi checks.
Installing the LG ThinQ Application
Steps to download and install the LG ThinQ app from app stores.
Using the Appliance Remotely
How to use the app to control the washer from a distance.
Remote Start Operation
Using the app to remotely start and monitor wash cycles.
Disabling Remote Start Manually
How to turn off the Remote Start function.
Download Cycle Function
Downloading new or specialized wash cycles via the app.
Smart Diagnosis™ Function
Using the feature to diagnose and solve appliance issues.
Diagnosing Issues with ThinQ
Transmitting troubleshooting data to a smartphone via the LG ThinQ app.
Diagnosing Issues with Audible Tones
Using sound tones to diagnose issues via the app.
Maintenance
Regular Cleaning
How to perform routine cleaning of the washer's interior and exterior.
Care After Wash
Steps to clean the door seal and wipe down the washer body.
Cleaning the Exterior
How to clean the door and outer surfaces of the washer.
Periodic Maintenance
General advice for maintaining the washer's condition over time.
Cleaning the Drum
Instructions for cleaning the drum to prevent residue and odors.
Leaving the Door Open
Advice to leave the door open to air out the drum and prevent odors.
Cleaning the Dispenser Drawer
How to remove and clean the detergent dispenser drawer.
Automatic Alert for Tub Clean
Notifies the user when the Tub Clean cycle is needed.
Removing Mineral Buildup
How to remove mineral scale from internal components.
Cleaning the Door Seal
Detailed steps for cleaning the door seal with a bleach solution.
Cleaning the Water Inlet Filters
How to clean inlet filters to ensure proper water filling.
Cleaning the Drain Pump Filter
Instructions for cleaning the drain pump filter to ensure proper draining.
Care in Cold Climates
Storing the Washer
Steps to protect the washer from freezing temperatures during storage.
When Water Inlet Hoses are Frozen
How to thaw frozen water inlet hoses and reconnect them.
When the Drain Hose is Frozen
How to thaw a frozen drain hose.
Troubleshooting
Before Calling for Service
Initial checks to perform before contacting customer support.
Frequently Asked Questions (FAQs)
Answers to common questions about washer operation and noises.
Error Messages
Lists common error codes and their possible causes/solutions.
Error Messages (Continued)
Further error codes and troubleshooting steps.
Vibration Sensor Errors
Troubleshooting for vibration sensor malfunctions.
Common Washer Noises
Identifies common washer noises and their causes.
Operation Issues
Troubleshooting problems like water leaking or excessive suds.
Incomplete Detergent Dispensing
Troubleshooting issues with detergent not dispensing properly.
Washer Not Operating Issues
Troubleshooting why the washer will not turn on or operate.
Water Not Draining Issues
Troubleshooting problems with water not draining or draining slowly.
Bleach Dispensing Issues
Troubleshooting problems with bleach not dispensing or dispensing prematurely.
Performance Issues
Solutions for problems like wrinkling, staining, and poor stain removal.
Odor Issues
Causes and solutions for odors in the washer.
Wi-Fi Connectivity Issues
Troubleshooting problems connecting the appliance to Wi-Fi.
Limited Warranty
USA Warranty Terms and Conditions
Details the terms, conditions, and warranty period for US customers.
USA Warranty Exclusions
Lists conditions and situations not covered by the limited warranty.
Obtaining Warranty Service (USA)
Information on how to contact LG for warranty service and support.
Dispute Resolution Notice (USA)
Information about dispute resolution procedures, including arbitration.
Arbitration Rules and Procedures (USA)
Details the rules for arbitration between the user and LG.
Governing Law and Fees (USA)
Explains applicable law and cost-sharing for arbitration.
Arbitration Hearings and Location (USA)
How and where arbitration hearings are conducted.
Opt Out Procedure (USA)
Instructions on how to opt out of the dispute resolution procedure.
CANADA Warranty Terms and Conditions
Details the warranty terms, conditions, and period for Canadian customers.
Canada Warranty Exclusions
Lists conditions not covered by the Canadian limited warranty.
Obtaining Warranty Service (Canada)
Information on contacting LG Canada for warranty service.
Canada Dispute Resolution Notice
Information on dispute resolution for Canadian customers.
Canada Arbitration Rules and Procedures
Details arbitration rules for Canadian disputes.
Canada Governing Law and Fees
Applicable law and fee structure for Canadian arbitration.
Canada Arbitration Hearings and Location
Location and conduct of arbitration hearings in Canada.
Canada Opt Out Procedure
How Canadian customers can opt out of arbitration.

Table of Contents