4.5 cu.ft. Smart Wi-Fi Enabled All-In-One Washer/Dryer with TurboWash® Technology

Black Steel

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  • Free Shipping, Installation & Haul Away


  • 4.5 cu.ft. Ultra Large Capacity
  • TurboWash® Technology
  • 6Motion™ Technology
  • Allergiene™ Cycle / AAFA Certified
  • LG ThinQ® Technology
  • Ventless Condensing Drying
4.5 cu.ft. Smart Wi-Fi Enabled All-In-One Washer/Dryer with TurboWash® Technology
$ 1,998.99
*1. Compared to an LG front load washer without TurboWash®. Based on AHAM-HLW-1-2010 test protocol. Cotton / Normal or comparable cycle at default settings, 8 lb. loads. Excludes quick wash or comparable cycles intended for small, lightly soiled loads only.

Warranty / Certifications


See compatible products below:


    • Series
    • LG
    • Type
    • Front Load Washer & Dryer Combo
    • Capacity (cu.ft.)
    • 4.5
    • Internal Heater
    • Yes
    • Steam
    • Yes
    • Width
    • 27"
    • Color
    • Black Steel (B)


    • Hard Buttons
    • Yes
    • Touch Buttons
    • Yes
    • Dial-A-Cycle™
    • Yes


    • IMEF
    • 2.4
    • IWF
    • 3.7


    • No. of Programs
    • 14
    • Programs
    • Normal, Heavy Duty, Bedding, Bright Whites™, Sanitary, Allergiene™, Tub Clean, Towels, Perm. Press, Sportswear, Delicates, Speed Wash, Drain+Spin, Downloaded


    • No. of Options
    • 12
    • Options
    • Steam, Fresh Care, Cold Wash, Delay Wash, Remote Start, Wi-Fi, TurboWash™, Rinse+Spin, Extra Rinse, Add Garments, Pre-wash, Control Lock


    • No. of Wash/Rinse Temps
    • 5
    • Wash/Rinse Temps
    • Extra Hot, Hot, Warm, Cold, Tap Cold
    • No. of Spin Speeds
    • 5
    • Spin Speeds
    • Extra High, High, Medium, Low, No Spin
    • Max RPM
    • 1300
    • Water Levels
    • Load Sensing
    • No. of Soil Levels
    • 5


    • TurboWash® 2.0 Technology
    • Yes
    • Steam Technology
    • Yes
    • Allergiene™ Cycle
    • Yes
    • Sanitary Cycle
    • Yes
    • ColdWash™ Option
    • Yes
    • SenseClean™ System
    • Yes


    • TrueBalance™ Anti-Vibration System
    • Yes
    • 4 Tray Dispenser
    • Yes
    • End of Cycle Signal
    • Yes
    • LoadSense
    • Yes
    • Child Lock
    • Yes
    • Auto Suds Removal
    • Yes
    • Leveling Legs
    • Yes
    • Easy Loading TilTub™
    • Yes


    • SmartDiagnosis™ (v3.0)
    • Yes
    • WiFi
    • Yes
    • Remote Start and Cycle Monitor
    • Yes
    • Energy Monitoring
    • Yes
    • Tub Clean Coach
    • Yes


    • AAFA
    • Yes


    • Motor Type
    • Inverter Direct Drive Motor
    • Axis
    • Horizontal


    • NeveRust™ Stainless Steel Drum
    • Yes
    • Cabinet
    • PCM
    • Control Panel
    • Plastic
    • Top Plate
    • Painted
    • Door / Rim
    • Glass/Chrome
    • Door Cover
    • Dark Blue Tinted Round Cover
    • All Available Colors
    • Black Steel (B)


    • Ratings
    • UL Listed
    • Electrical Requirements
    • 120V, 10 Amps
    • Type
    • Electric


    • Pedestal
    • WDP4B
    • Pedestal (WxHxD)
    • 27" x 14 1/8" x 30 3/4" (50 9/16" D with door open)
    • LG Sidekick™ Pedestal Washer
    • WD100CB
    • LG Sidekick™ Pedestal Washer (WxHxD)
    • 27" x 14 1/8" x 30 3/4" (50 9/16" D with door open)


    • Product (WxHxD)
    • 27" x 39" x 30 1/4"
    • Depth with Door Open
    • 55"
    • Carton (WxHxD)
    • 29 23/32" x 41 27/32" x 31 17/32"
    • Weight (Product)
    • 213.8 lbs.
    • Weight (Carton)
    • 235.9 lbs.


    • Parts and Labor
    • 1 Year
    • Direct Drive Motor
    • 10 Years
    • Drum
    • 3 Years


    • UPC
    • 048231027946

What people are saying

Rated 4 out of 5 by from Very Happy With This Unit The washer does an excellent job of cleaning clothes. Has great selection of cycles to choose from. Dryer performs great. It does take longer to dry a load but that's no problem because I'm not in a hurry for load to get finished. Actually for sheets and small loads there is not much difference to wash/dry a load in this unit vs. a conventional dryer. Quiet operation. The one draw back I have is that lint builds up around door window and door gasket after drying.
Date published: 2021-05-05
Rated 5 out of 5 by from I bought mine a couple of weeks ago. Had some problems learns all the new dials, but now I am a happy customer and my clothes are getting really clean and I love my new washer
Date published: 2021-05-05
Rated 5 out of 5 by from Great Washing Machine Good machine, easy to operate, great performance! Only disappointing item is the LG app, it contains only programs with pre-selected features and connot be changed. All pre-loaded programs do not have the option for using the dryer and I bought a washing-dryer combo????
Date published: 2021-04-28
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SALE : $1,998.99
In Stock
Sold and Fulfilled by LG
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Ask your questions. Share your answers.
Please review the detailed product information and help guides in the
Product Support section for this product prior to posting a question.

How can I get the machine to just dry clothes? 

Asked by: Bikinglove
To run a Dry Only cycle with the LG 4.5 cu.ft. Smart Wi-Fi Enabled All-In-One Washer/Dryer with TurboWash® Technology, Model # WM3998HW, after you press the Power button to turn on the unit, press the Dry Button until you select your desired dry level or time is selected then press the Start/Pause to begin the cycle...^IFV
Answered by: Ivanf
Date published: 2021-05-03

What kind of unit does the dryer run on? Is it a heat pump? Or just a condenser? Not much information readily available.

Asked by: One Person
The unit offers Ventless Condensing Drying. ^Daphane
Answered by: LG Electronics
Date published: 2020-12-31

Hello, I need to know how I can use this machine. this is terrible to use, because time. and I don't know how to use for dry. I got the app in my phone but i don't know what I have to do to wash or dryer . please help me.

Asked by: jane3377
Please contact LG Customer Support by direct message via Twitter (@LGUSSupport) or Facebook Messenger (https://www.facebook.com/LGUSA/). Please be sure to provide your name, phone number, address, email, model/serial numbers, and date of purchase and we will be happy to assist you. ^Daphane
Answered by: LG Electronics
Date published: 2020-12-31

WM3998HBA What are the dryer cycle options? Is there a low temperature dry for permanent press fabrics? My last LG All-in-One had a steam function to refresh clothes without washing them(Removed wrinkles!). Does this model have this same function?

Asked by: goldpony10
The LG 4.5 cu.ft. Smart Wi-Fi Enabled All-In-One Washer/Dryer with TurboWash® Technology, Model # WM3998HBA does not have dryer cycle options. You should use the Automatic Cycles to dry most loads. Electronic sensors measure the temperature of the exhaust to increase or decrease drying temperatures for faster reaction time and tighter temperature control. For the most even drying, make sure that all your clothing articles are similar in material and thickness. The unit does have a Steam option that uses hot steam that provides a superior cleaning performance and gives you the benefits of a very hot wash. It also features an Allergiene™ Cycle that automatically incorporates steam into the wash cycle...^IFV
Answered by: Ivanf
Date published: 2020-11-02

Washer doesn't start /after pressed On Show EE on board'

Asked by: Brasson
Hi Brasson. Pages 46-47 in your owner's manual for the LG 4.5 cu.ft. Smart Wi-Fi Enabled All-In-One Washer/Dryer with TurboWash® Technology, Model # WM3998HBA has a list of error codes for the washer. Regrettably, error code "EE" is not listed. Please contact our Support Center at (800) 243-0000 for assistance...^IFV
Answered by: Ivanf
Date published: 2020-10-02

Is there a dry only option ?

Asked by: cloud5242
Yes, one can use the dry only function.
Answered by: Golddog
Date published: 2020-11-25

For the drying cycle, is there a gas utility option instead of electric?  

Asked by: Shanedogg
No. This unit is electric and uses a 110v outlet.
Answered by: JoseLG
Date published: 2020-07-20

Is there a place from which I need to remove lint after every wash?

Asked by: abhishek anand
Yes, the bottom left-hand corner has a compartment that can be opened allowing the removal of lint and a hose to remove excess water.
Answered by: JoseLG
Date published: 2020-07-26
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