27 Inch Smart Washer/Dryer Combo with 4.5 cu. ft. Capacity, Wi-Fi Enabled, 14 Wash Cycles, 1300 RPM, Ventless, TurboWash, 6Motion Technology, ColdWash, NeveRust Stainless Steel Drum, SmartThinQ Works with Google Assistant/Amazon Alexa, 10 Year Warranty on Direct Drive Motor, TrueBalance, WiFi Connect, Child Lock, Cold Wash Cycle, SmartDiagnosis, Allergiene Cycle, SenseClean System in Black Steel.


LG WM3998HBA Overview

WM3998HBA This Front Load Washer & Dryer Combo from LG offers 4.5 cu. ft. of capacity with 14 wash cycles and 12 options. The washer & dryer combo features TurboWash technoloy, 6Motion technolgy, Steam Techology & Allergiene and LG ThinQ.


Fast Forward Your Wash
Give big loads the same great clean while cutting your wash time by up to 30 minutes with LG’s enhanced TurboWash® technology.

A Smarter Way to Wash
6Motion™ Technology uses up to 6 different wash motions to provide a smart cleaning experience that is gentle on clothes and maximizes washing performance.

AAFA Certified LG Washers
LG washers with the Allergiene™ Cycle use the power of steam to remove over 95% of pet dander and dust mites.

Think you can’t do laundry on the go? Think Again.
Expand the limits of your laundry room with the LG ThinQ® app. Select a cycle, start or stop the wash and get notifications about when your laundry will be done, all from your smartphone. It even works with the Google Assistant and Amazon Alexa, so you can manage your laundry with simple voice commands.

Get it All Done In Less Time
Ultra-large capacity (4.5 cu.ft.) means you have the room to do more laundry in fewer loads.

Ventless Drying
No access to external venting? No problem. LG’s all-in-one washer/dryers use ventless condensing to dry your clothes without the need for external venting.

ColdWash™ Technology
Using the cold cycle on your washer doesn’t have to mean compromising. ColdWash™ technology uses cold water and enhanced washing motions to penetrate deep into fabrics, giving you cold water savings with warm water performance.

Additional Features:

  • 4.5 cu. ft. Ultra Large Capacity
  • TurboWash® Technology
  • 6Motion™ Technology
  • Steam Technology & Allergiene™ Cycle / AAFA Certified
  • LG ThinQ® Technology
  • Ventless Condensing Drying
  • ColdWash™ Technology
  • Direct Drive Motor 10-Year Limited Warranty
  • LG SideKick™ Compatible
  • NeveRust™ Stainless Steel Tub


  • Normal
  • Heavy Duty
  • Bedding
  • Bright Whites
  • Sanitary
  • Allergiene
  • Tub Clean
  • Towels
  • Perm. Press
  • Sportswear
  • Delicates
  • Speed Wash
  • Drain+Spin
  • Downloaded


  • Steam
  • Fresh Care
  • Cold Wash
  • Delay Wash
  • Remote Start
  • Wi-Fi
  • TurboWash®
  • Rinse+Spin
  • Extra
  • Rinse
  • Add Garments
  • Pre Wash
  • Control Lock


  • Limited 1 Year Parts & Labor Warranty
  • 10 Years on Direct Drive Motor
  • 3 Years on Drum

LG WM3998HBA Features

SmartThinQ Works with Google Assistant/Amazon Alexa

Enjoy new ways to control your home with LG smart appliances. LG Smart ThinQ works with Google Assistant and Amazon Alexa, making it easy to control your LG appliances with your voice.

NeveRust Stainless Steel Drum

This stainless steel drum is designed to last for many, many years without rust. Longevity allows for many large loads over the course of many years!

End of Cycle Signal

Alerts you when the load is done, so clothes can be removed before wrinkles set in

SenseClean System

SenseClean is a water and energy conservation system that uses sensors to detect the size and the weight of the laundry load. It is an excellent solution for those that want to save time and energy.

Sanitize Clothes, Toys and More

The Sanitary cycle powered by TrueSteam® helps reduce allergens in clothes, bedding, sportswear—even your children`s plush toys. LG Styler can help sanitize the fabrics in your home easily.

Cold Wash Cycle

This washer helps power out tough stains using cold water and extra cleaning action. This means you get energy savings with the gentleness of cold water.

Allergiene Cycle

The ALLERGIENE™ cycle uses the intense heat of steam to remove over 95% of common household allergens, like dust mites and pet dander. Use this cycle to wash cloths that accumulate dust–like pillow covers, and bed sheets–or with items that deserve special care–like baby clothes and undergarments.

The hottest thing in cold clean – Using the cold cycle on your washer doesn`t have to mean compromising. ColdWash technology uses cold water and washing motions to penetrate deep into fabrics, giving you cold water savings with warm water performance.

Child Lock

The Child Lock function prevents the unit from being accidentally switched on.

WiFi Connect

Control your appliance from any room in the house with your Smart phone using WiFi Connect

10 Year Warranty on Direct Drive Motor

LG backs the Direct Drive Motor with a 10 year limited warranty

The direct drive motor transfers power from the motor to the drum without belts and balances the load automatically.


The SmartDiagnosis™ feature helps the service center diagnose problems over the phone, or with a simple app on your smart phone, helping you minimize costly, inconvenient service calls.

Turbo Wash allows you to save time on larger loads, with outstanding cleaning performance!

Get everything clean and experience a smart way to wash with innovating 6Motion technology! Each wash cycle combines up to six different ash motions to provide a revolutionary cleaning experience.

Additional information

Exterior Width










Smart Appliance


Condensing Drying


Control Type

Venting Type




ADA Compliant

Drum Material

Temperature Settings

Steam Cycle

Leveling Legs

Door Type

Child Lock

Remote Diagnostics

Works with Google Assistant

Works with SmartThinQ


NeveRust Stainless Steel Drum

Wash Cycles

Maximum Spin Speed (RPM)


6Motion Technology

Cold Wash Cycle


SenseClean System


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