Pros / This washer dryer combo has the biggest capacity and the highest number of both washing and drying cycles.

Cons / It isn’t as compact as other units.

 Verdict / The LG WM3997HWA is a complete, efficient machine with a generous warranty and a variety of options for washing and drying, making it the best washer dryer combo we looked at.

The LG WM3997HWA washer dryer combo is a dependable appliance that saves you time doing laundry. This all-in-one washer dryer uses TurboWash technology with high-pressure nozzles. It may be the largest washer dryer we reviewed, but its efficient use of space puts it in the running for the best washer dryer combo.

This LG has a complete list of diverse cycles, a customizable drying program and additional features that keep the machine quiet for washing at night. The LG WM3997HWA puts its size primarily in height, so its length and width are still convenient for storing in average closets. Its in-depth functionality, diverse cycles and unique features earn it our Top Ten Reviews Gold Award.

LG WM3997HWA Visit Site
  • Washing & Drying Capacity
  • Number of Soil Levels
  • Number of Water Temperatures
  • Energy Use Rating
  • Parts & Labor
  • Motor
  1. This is the amount of space available in the drum for your clothes when washing.
    More is Better.
  2. 1  LG WM3997HWA
    4.2 cu. ft.
  3. 2.0 cu. ft.
  4. 3  Midea
    2.0 cu. ft.
  5. Category Average
    2.19 cu. ft.


At 4.2 cubic feet, this combination washer dryer has the largest drum of the units we tested, but includes it without sacrificing a lot of space. The most important benefit all-in-one washer dryers have is how little room they take up in your home, so your main concern about this LG unit is likely whether it can be stored properly. It is much taller than other washer dryers, but its length and width only add a couple of inches. This means that even with its height, it should still fit in the place you have set aside for the unit.

The LG comes with 14 different washer settings, which is the highest number available on the units we reviewed. It’s also one of the few washer dryers that allow you to change the soil level, so you can be precise about the water and energy you use. If your clothes are lightly soiled, using a lower setting saves you money over time. This machine’s estimated yearly operating costs are higher than most washer dryer combos, but this makes sense given the large capacity of this unit. Its capacity more than doubles the average capacity of the washer dryer units in our lineup.

Washing Cycles

With the number of washing and drying cycles it offers, the LG is the most complete washer dryer combo. It includes common cycles you expect to see on a top all-in-one washer dryer, such as normal, delicate, colors and permanent press.

Beyond the usual, though, it includes a cycle for self-cleaning, the option to preprogram a favorite cycle with your choice of heat and soil level, and a high-speed bleach wash specifically for white fabrics. One standout cycle it offers is its sanitizer. The washing machine can deep clean clothes, and the company claims this sanitize mode can remove 99.9 percent of germs. This is useful if you have a young child with a favorite stuffed animal that needs to be decontaminated.

Drying Cycles

A big concern with combination washer dryers is that, often, the drying option is treated as a secondary function of the unit. Several default to a hot temperature and only allow you to control the length of the drying cycle.

LG gives you a lot of different drying choices. Timed dry is available, but you can also control the dryness level and the temperature setting. This is an important option for a dryer when you have clothes made of materials that are prone to shrinking. With other units, you may have to air dry materials like wool sweaters or denim jeans.

Additional Features

The digital display on this LG machine is easy to read. The machine uses both buttons and a knob for controls, and the timer is bright on the LED screen. This is a great feature, considering that many units expect you to estimate how much time is left by looking at the movement of the knob.

These units are compact and should remain out of sight and out of mind. This is hard to do when the appliance shakes if a load is uneven or lets out a shrill beep when the machine has finished. The LG lets you silence the signals for running the machines while the household is asleep, and it automatically regulates noise through vibration reduction. This means that when the load becomes uneven, the machine senses it and relaxes the drum enough to allow the load to even itself out. This leads to a smooth, quiet wash.

Warranty & Support

The LG website is substantial and supportive. The main page for the appliance has several videos that educate you on the functions of the machine, and a full PDF of the instruction manual is available. You can reach customer service by phone seven days a week, and email is an option as well. The support tab allows you to perform several tasks, including registering the product, watching tutorials and reading through a help library based on the model number of your unit. The warranty is one of the best available. The motor is covered for 10 years and the drum is covered for the life of the machine. Parts and labor are a standard one-year warranty.


We gave the LG WM3997HWA a perfect score, as it stood out in every category. In designing this washer, LG took into consideration every extra a consumer would look for in a compact combo machine. It keeps a lot of the best qualities of standalone units and puts them into one convenient appliance. Although it is made for small apartments or cabins, this is one washer dryer combo that can fit in any household.

LG WM3997HWA Visit Site

Specifications and Benchmarks


Height (inches)
Width (inches)
Depth (inches)

Warranty & Support

Parts & Labor
1 Year
10 Years
Wash Drum
Manufacturer Support
Online User Manual


Washing & Drying Capacity (cubic feet)
Space Efficiency
Total Soil Levels
Total Water Temperatures
Energy Use Rating (estimated yearly operating costs)

Drying Cycles

Manual Timed Dry
Normal Dry
Damp Dry
More Dry
Low Temp Dry

Additional Features

Child Lock
Automatic Dispensers
Full Digital Display
Spin Speed Control
Automatic Load Sense
Vibration Reduction
Silence Signals

Washing Cycles

Wash Cycles
Prewash Option
Rinse & Spin
Delay Wash
Clean & Sanitize