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OWNER'S MANUAL
WASHER AND
DRYER
Read this owner's manual thoroughly before operating the
appliance and keep it handy for reference at all times.
ENGLISH
WM3998HBA
www.lg.com
MFL71728991
Copyright © 2023 LG Electronics Inc. All Rights Reserved.
Rev.00_042523

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Summary of Contents for LG WM3998HBA.ABLEVUS

  • Page 1 Scan to see the online manual. OWNER'S MANUAL WASHER AND DRYER Read this owner's manual thoroughly before operating the appliance and keep it handy for reference at all times. ENGLISH WM3998HBA www.lg.com MFL71728991 Copyright © 2023 LG Electronics Inc. All Rights Reserved. Rev.00_042523...
  • Page 2: Table Of Contents

    Loading the Washer Adding Cleaning Products Control Panel Wash Cycles Cycle Modifiers Dry Cycles Options and Extra Functions 34 SMART FUNCTIONS Using LG ThinQ Application Smart Diagnosis Function 38 MAINTENANCE Regular Cleaning Periodic Maintenance Care in Cold Climates 44 TROUBLESHOOTING...
  • Page 3: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS READ ALL INSTRUCTIONS BEFORE USE Safety Messages Your safety and the safety of others are very important. We have provided many important safety messages in this manual and on your appliance. Always read and follow all safety messages.
  • Page 4 • Use this appliance only for its intended purpose. • If the product has been submerged in water, sitting in standing water, or waterlogged, do not come in contact with the product and immediately contact an LG Electronics Customer Information Center for instructions before resuming use.
  • Page 5 IMPORTANT SAFETY INSTRUCTIONS • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. • Do not mix chlorine bleach with ammonia or acids such as vinegar. Follow package directions when using laundry products.
  • Page 6: Caution Statements

    IMPORTANT SAFETY INSTRUCTIONS CAUTION STATEMENTS CAUTION • To reduce the risk of minor or moderate injury to persons, malfunction, or damage to the product or property when using this product, follow basic precautions, including the following: Installation • Install the product on a firm and level floor. Operation •...
  • Page 7: Product Overview

    • For your safety and for extended product life, use only authorized components. The manufacturer is not responsible for product malfunction, property damage or bodily injury caused by the use of separately purchased unauthorized components, parts, or non-LG products. Front View...
  • Page 8 PRODUCT OVERVIEW Accessories Product Specifications Model WM3998H*A Included Accessories Electrical 120 V~, 60 Hz Requirements Min. / Max. Water 20 - 120 psi (138 - 827 Pressure kPa) Dimensions (Width X 27'' X 39'' X 30 1/4'' (70 Height X Depth) cm X 99 cm X 77 cm) Maximum Depth with 55'' (139.6 cm)
  • Page 9: Installation

    INSTALLATION INSTALLATION Before Installing Installation Overview Please read the following installation instructions first after purchasing this washer or transporting it to another location. Choosing the Proper Location Unpacking and Removing Shipping Material Connecting the Inlet Hoses Connecting the Drain Hose Leveling the Washer Final Installation Check WARNING...
  • Page 10: Choosing The Proper Location

    10 INSTALLATION WARNING • Certain internal parts are intentionally not grounded and may present a risk of electric shock only during servicing. Service personnel- Do not contact the following parts while the appliance is energized: pump, valve, motor, control board. Tools Needed •...
  • Page 11: Unpacking And Removing Shipping Material

    INSTALLATION Unpacking Shipping Material Dimensions and Clearances *Some models do not ship with drum support. 1/4'' (0.5 cm) Lift the washer off the foam base. • After removing the carton and shipping Stacking or Pedestal Installation material, lift the washer off the foam base. The washer can be stacked under a dryer or on top •...
  • Page 12: Connecting The Water Inlet Hoses

    Old hoses could leak faucet. or burst causing flooding and property damage. Contact an LG Customer Information Center for assistance in buying hoses. NOTE • Periodically check the hoses for cracks, leaks, and wear, and replace the hoses every five years.
  • Page 13: Connecting The Drain Hose

    INSTALLATION • The end of the drain hose should be located a Flush out the inlet hoses. minimum of 24" (61 cm) and a maximum of 96" • After the hoses are connected, turn on the (244 cm) above the bottom of the washer. water faucets and flush out any foreign •...
  • Page 14: Leveling The Washer

    14 INSTALLATION Use the provided tie strap to secure the drain hose in place. If the water valves and drain are built into the wall, fasten the drain hose to one of the water Leveling the Washer hoses with the provided tie strap (ribbed side on inside).
  • Page 15: Final Installation Check

    INSTALLATION inch, and all 4 leveling feet must rest firmly Clean the floor to attach the non-skid pads. on the floor. • Use a dry rag to remove and clean foreign objects or moisture. If moisture remains, the non-skid pads may slip. Adjust the level after placing the washer in the installation area.
  • Page 16 16 INSTALLATION WARNING NOTE • Connect this appliance to a grounded outlet • If water leaks during water supply, see conforming to the rating prior to use. Failure to Connecting the Water Inlet Hoses to connect do so may result in fire, electric shock, or them properly.
  • Page 17: Operation

    OPERATION OPERATION Before Use WARNING • To reduce the risk of fire, electric shock, or injury to persons, read the SAFETY INSTRUCTIONS before operating this appliance. Operation Overview Sort laundry and load the washer. • Sort laundry by fabric type, soil level, color and load size as needed. Open the door and load items into the washer.
  • Page 18: Sorting Laundry

    18 OPERATION End of cycle. • When the cycle is finished, a melody sounds. Immediately remove the clothing from the washer to reduce wrinkling. • Check around the door seal when removing the load for small items that may be caught in the seal. NOTE •...
  • Page 19: Loading The Washer

    OPERATION outdoor clothes, and plastic mats.) Failure to do so may result in personal injury or damage to the washer, clothes, walls, floor, and surrounding objects due to abnormal vibration. • Remove the stuffing from pillows and cushions before washing the covers. Failure to do so can cause excessive vibration, resulting in damage to the washer, clothes, nearby objects, walls, and floor.
  • Page 20: Adding Cleaning Products

    20 OPERATION • The washer can be fully loaded, but the drum • For proper wash performance, always measure should not be tightly packed with items. The detergent using the measuring device provided door of the washer must close easily. by the detergent manufacturer.
  • Page 21 OPERATION • When using the Pre-wash option, liquid Load the laundry products into the detergent for the main wash needs to be loaded appropriate compartments. in the liquid detergent cup accessory in the main • Follow the manufacturer’s wash dispenser (where applicable), to prevent it recommendations when adding cleaning from being dispensed with the pre-wash products.
  • Page 22 22 OPERATION NOTE • Do not add powdered bleach to this compartment. The bleach compartment is designed to dispense liquid chlorine bleach only. Powdered or liquid color-safe bleach will not dispense properly. • Follow the manufacturer’s recommendations when adding bleach. Never add more than one cup, and do not exceed the maximum fill line or the bleach may be dispensed immediately and damage fabrics.
  • Page 23: Control Panel

    OPERATION Control Panel Control Panel Features Power On/Off Button • Press this button to turn the washer on or off. • Pressing this button during a cycle will cancel that cycle and any load settings will be lost. • The door will unlock after a brief pause. NOTE •...
  • Page 24 24 OPERATION Time and Status Display Cycle Status Indicators • These LEDs will blink when a cycle is selected to indicate which stages will run. • When a cycle is running, the LED for the active stage will blink, and the LEDs for the remaining stages will remain steady.
  • Page 25: Wash Cycles

    OPERATION Wash Cycles The wash cycles are designed for specific types of wash loads. Select the cycle that best matches the load contents for maximum wash performance and fabric care. See Sorting Laundry section for best results, and follow the fabric care labels on your garments. For a guide to fabric care symbols, see Sorting Laundry section.
  • Page 26 26 OPERATION Cycle Bedding Wash Temp. Default: Warm Available: Hot, Warm, Cold, Tap Cold Spin Speed Default: Medium Available: Medium, Low, No Spin Soil Level Default: Normal Available: All Cycle Bright Whites Description This cycle is for washing white items only. (less than 15 lb (6.8 kg)) Wash Temp.
  • Page 27 You can use a smartphone to download a specialized cycle to this cycle position. • The default cycle is Small Load, used for normally soiled loads with a few items. This cycle is also available for download. • Refer to the LG ThinQ application to see the cycles available for download.
  • Page 28 28 OPERATION Cycle Downloaded (Small Load) Wash Temp. Default: Warm Available: Hot, Warm, Cold, Tap Cold Spin Speed Default: High Available: All Soil Level Default: Normal Available: All Available Options † This option is automatically included in the cycle and cannot be deselected. NOTE •...
  • Page 29: Cycle Modifiers

    OPERATION Cycle Modifiers Spin Higher spin speeds extract more water from clothes, reducing drying time and saving energy. About Modifier Buttons • Press the Spin button repeatedly until the Each cycle has default settings that are selected desired speed is selected. automatically.
  • Page 30 30 OPERATION Woven and Loopknit Materials Turbo Use this function when you dry clothes for a Some woven and loopknit materials may shrink, by shorter time after finishing a washing cycle. varying amounts, depending on their quality. Always stretch these materials out immediately NOTE after drying.
  • Page 31: Options And Extra Functions

    OPERATION Fresh Care Press the Power button. Use this function when you will not be able to • Do not select a washing cycle and do not unload your clothes immediately after the wash add a detergent. cycle ends. • The drum will tumble periodically for up to 19 Press the Dry button as necessary.
  • Page 32 32 OPERATION Add Garments Cold Wash Use this function to add garments or remove Press the Cold Wash button to save energy by foreign objects like coins or keys after the cycle has using cooler water. It will increase the wash and started.
  • Page 33 OPERATION Locking/Unlocking the Control Panel Turn on the power. Press and hold the Rinse+Spin button for 3 seconds to activate/deactivate this function. • When the function is deactivated, a chime will sound and the remaining time for the current cycle will reappear on the display.
  • Page 34: Smart Functions

    Apple App Store on a smartphone. - This function provides useful information for diagnosing and solving issues with the Run the LG ThinQ application and sign in with appliance based on the pattern of use. your existing account or create an LG account •...
  • Page 35 To check your network frequency, contact (Max) your Internet service provider or refer to your wireless router manual. • LG ThinQ is not responsible for any network FCC Notice connection problems or any faults, malfunctions, or errors caused by network connection.
  • Page 36: Smart Diagnosis Tm Function

    IC Radiation Exposure Statement troubleshooting data to a smartphone using the LG ThinQ application. This equipment complies with IC radiation • Launch the LG ThinQ application and select the exposure limits set forth for an uncontrolled environment. Smart Diagnosis feature in the menu. Follow...
  • Page 37 SMART FUNCTIONS Press and hold the Temp. button for 3 seconds or until the audible tones start. Hold the smartphone mouthpiece to the Power button until the data transfer is complete. • Keep the smartphone in place until the data transfer has finished.
  • Page 38: Maintenance

    38 MAINTENANCE MAINTENANCE • Wipe with a damp cloth. WARNING • Do not touch the surface or the display with • To reduce the risk of fire, electric shock, or injury sharp objects. to persons, read this entire owner’s manual, including the SAFETY INSTRUCTIONS, before operating this appliance.
  • Page 39 MAINTENANCE Leaving the Door Open • Do not exceed the maximum fill line when adding bleach or powdered cleaners. After you finish using the washer, leave the door Powdered cleaners may remain in the drum open overnight to allow air to circulate and dry the after cleaning.
  • Page 40 40 MAINTENANCE To clean the drawer opening, use a small, WARNING non-metal brush to clean the recess. Remove • The inlet screens protect the delicate parts of the all residue from the upper and lower parts of inlet valve from being damaged by particles that the recess.
  • Page 41 MAINTENANCE Flush then reattach the water hoses. • Before reattaching the water inlet hoses, flush them by running several gallons of water through them into a bucket or drain, preferably with the faucets wide open for maximum flow. NOTE • An error message may blink on the display when the water pressure is low or an inlet filter is clogged with dirt.
  • Page 42: Care In Cold Climates

    42 MAINTENANCE Add 1 gallon of nontoxic recreational vehicle (RV) antifreeze to the empty drum and close the door. • Never use automotive antifreeze. Turn on the washer and press the Spin button. Press the Start/Pause button to start the Close the drain pump filter cover.
  • Page 43 MAINTENANCE Immerse the water inlet hoses in hot water to thaw them. Reconnect the water inlet hoses to the water inlets of the washer and to the faucets. • See Connecting the Water Inlet Hoses for details. Turn on the faucets. Press the Power button to turn on the washer.
  • Page 44: Troubleshooting

    44 TROUBLESHOOTING TROUBLESHOOTING Before Calling for Service The washer is equipped with an automatic error-monitoring system to detect and diagnose problems at an early stage. If the washer does not function properly or does not function at all, check the following before you call for service.
  • Page 45 TROUBLESHOOTING Problem Possible Cause & Solution The load is too small. • Add additional items to allow the washer to balance the load. UNBALANCE ERROR Heavy articles are mixed with lighter items. • Always try to wash articles of somewhat similar weight to allow the washer to evenly distribute the weight of the load for spinning.
  • Page 46 46 TROUBLESHOOTING Problem Possible Cause & Solution Vibration sensor malfunctions. • Call for service. VIBRATION SENSOR ERROR Noises Problem Possible Cause & Solution Clicking Door lock sounds when the door locks or unlocks. • Normal operation Spraying or hissing Water spraying or circulating during the cycle •...
  • Page 47 TROUBLESHOOTING Problem Possible Cause & Solution Banging noise when Plumbing in the home moves or flexes when the water valves in the washer shut off. the washer is filling • Water hammer is not caused by a defect in the washer. Install water hammer arrestors with water.
  • Page 48 48 TROUBLESHOOTING Problem Possible Cause & Solution Incomplete or no Detergent compartments clogged from incorrect filling. dispensing of • Make sure that detergent and additives are put into the correct dispenser compartments. detergent • For all detergent types, always make sure that the dispenser drawer is fully closed before the start of the cycle.
  • Page 49 TROUBLESHOOTING Problem Possible Cause & Solution Washer stops for a A motor protection device has been activated to prevent overheating of the motor. few minutes and • This is normal. If the motor protection device is activated, the washer will stop for a few then restarts.
  • Page 50 50 TROUBLESHOOTING Problem Possible Cause & Solution Wrinkling Washer is overloaded. • The washer can be fully loaded, but the drum should not be tightly packed with items. The door of the washer should close easily. Hot and cold water inlet hoses are reversed. •...
  • Page 51 During Wi-Fi setup, the app is requesting a password to connect to the product (on certain phones). • Locate the network name which starts with "LG" under Settings > Networks. Note the last part of the network name. - If the network name looks like LGE_Appliance_XX-XX-XX, enter lge12345.
  • Page 52: Limited Warranty

    Should your LG Washer (“Product”) fail due to a defect in materials or workmanship under normal and proper use, during the warranty period set forth below, LG will, at its option, repair or replace the Product. This limited warranty is valid only to the original retail purchaser of the Product (“You”) and applies only when purchased lawfully and used within the United States including U.S.
  • Page 53 Notice of Dispute. In the event you intend to commence an arbitration proceeding, you must first notify LG in writing at least 30 days in advance of initiating the arbitration by sending a letter to LG at LG Electronics, USA, Inc. Attn: Legal Department-Arbitration 111 Sylvan Avenue, Englewood Cliffs, NJ 07632.
  • Page 54 If you and LG are unable to resolve the dispute within 30 days, either party may proceed to file a claim for arbitration.
  • Page 55 LIMITED WARRANTY www.lg.com/us/support/repair-service/schedule-repair-continued and clicking on “Find My Model & Serial Number”). You may only opt out of the dispute resolution procedure in the manner described above (that is, by e-mail or telephone); no other form of notice will be effective to opt out of this dispute resolution procedure.
  • Page 56: Canada

    ARE NOT PERMITTED. PLEASE SEE THE SECTION TITLED “PROCEDURE FOR RESOLVING DISPUTES” BELOW. Should your LG Washer ("Product") fail due to a defect in materials or workmanship under normal and proper use, during the warranty period set forth below, LG Electronics Canada, Inc. ("LGECI") will, at its option, repair, replace or pro rate the Product upon receipt of proof of the original retail purchase.
  • Page 57 (ASC), as determined by LG Canada. If your Product is located outside a 150 km radius from a ASC, as determined by LG Canada, it will be your responsibility to bring the Product, at your sole expense, to the ASC for in-warranty repair.
  • Page 58 If you and LG are unable to resolve the dispute within 30 days of LG’s receipt of the Notice of Dispute, the dispute shall be resolved by binding arbitration in accordance with the procedure set out herein.
  • Page 59 Except as otherwise provided for, LG waives any rights it may have to seek attorneys’ fees and expenses from you if LG prevails in the arbitration.
  • Page 60 LG Customer Information Center For inquiries or comments, visit www.lg.com or call: U.S.A. 1-800-243-0000 1-888-542-2623 CANADA Register your product Online! www.lg.com...

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