LG WM3420CW 27 inch Smart Front Load Washer with 4.5 cu. ft. Capacity, AI Wash, 6Motion Technology and ENERGY STAR Certified in White
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LG
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Consumer Reports standouts across laundry and refrigeration that shoppers consistently love.
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Fan-favorite reliability keeps return rates low across LG's broad appliance lineup.
LG WM3420CW Features
Features:
- 4.5 cu. ft. Ultra Large Capacity lets you clean larger loads
- 6Motion™ technology uses different wash motions for a thorough clean
- With ColdWash™ technology, clean like warm and save like cold
- Built-in intelligence takes out the guesswork—AI technology selects optimal wash settings
- Get the ThinQ® app to access smart functions, ThinQ Care™ alerts and download new ThinQ UP™ features
- Direct Drive Motor 10-Year Limited Warranty
- ENERGY STAR Certified for an efficient clean that saves on water and energy
Why Buy LG WM3420CW 4.5 cu. ft. Ultra Large Capacity Smart Front Load Washer
- Ultra-large capacity: 4.5 cu. ft. drum handles bigger loads and bulky items like bedding, reducing the number of wash cycles.
- Advanced cleaning motion: 6Motion™ technology combines multiple wash motions for a thorough yet gentle clean.
- Energy-saving performance: ColdWash™ delivers the cleaning power of warm water while using cold water to save energy and protect fabrics.
- Smart wash automation: Built-in AI automatically selects optimal wash settings, taking the guesswork out of laundry.
- ThinQ® smart features: The ThinQ® app allows remote monitoring, cycle control, and access to new features through ThinQ UP™ updates.
- Durable motor: Direct Drive Motor with a 10-year limited warranty ensures long-lasting reliability.
- Efficient and cost-effective: ENERGY STAR® certification provides water and energy savings while maintaining excellent cleaning performance.
Frequently Asked Questions
Q: What is the washer’s capacity?
A: The WM3420CW features a 4.5 cu. ft. ultra-large drum, allowing you to wash larger loads and bulky items like bedding and towels in fewer cycles.
Q: What cleaning technologies does it use?
A: It uses 6Motion™ technology, which combines multiple wash motions tailored to different fabrics for a thorough yet gentle clean.
Q: How does ColdWash™ work?
A: ColdWash™ technology mixes advanced wash motions with cold water to deliver the cleaning performance of warm water while saving energy and protecting fabrics.
Q: What smart features does this washer have?
A: The washer has built-in AI that selects optimal wash settings automatically, and the ThinQ® app allows remote monitoring, cycle control, and access to new features via ThinQ UP™ updates.
Q: Is the washer energy-efficient?
A: Yes, it is ENERGY STAR® certified, providing water and energy savings while maintaining excellent cleaning performance.
Q: How reliable is the motor?
A: The Direct Drive Motor is backed by a 10-year limited warranty, offering long-term durability and peace of mind.
Q: Does it handle large or bulky items?
A: Yes, the ultra-large capacity drum combined with 6Motion™ technology makes it ideal for bulky loads like comforters, blankets, and towels.
Q: Can I troubleshoot issues myself?
A: Many minor issues can be diagnosed through the ThinQ® app, which provides alerts and guidance to help resolve problems quickly.
Pros and Cons of LG WM3420CW 4.5 cu. ft. Ultra Large Capacity Smart Front Load Washer
Pros
- Ultra‑large capacity: 4.5 cu. ft. drum handles large loads and bulky items like comforters and towels, reducing the number of wash cycles needed.
- Advanced cleaning technology: 6Motion™ uses multiple wash motions for tailored, effective cleaning across different fabric types.
- Energy‑saving wash: ColdWash™ delivers warm‑water cleaning performance using cold water, saving energy while protecting clothes.
- Smart automation: Built‑in AI automatically selects optimal wash settings, taking the guesswork out of cycle selection.
- ThinQ® smart features: Remote monitoring, cycle control, alerts, and feature updates through the ThinQ® app add convenience and connectivity.
- Durable motor: Direct Drive Motor with a 10‑year limited warranty offers reliable, long‑lasting performance.
- Efficient operation: ENERGY STAR® certification helps reduce water and energy use without compromising cleaning performance.
Cons
- No steam cleaning option: Lacks a dedicated steam cycle that some premium washers offer for deep stain removal.
- Smart features require app: Some users may find the ThinQ® app setup or operation less intuitive if not familiar with smart home technology.
- Front‑load maintenance: Like all front‑load washers, regular gasket and door seal cleaning are needed to prevent odor buildup.
Conclusion
The LG WM3420CW is a feature‑rich, smart front‑load washer that excels in capacity, cleaning technology, and intelligent operation. Its combination of large drum size, energy‑saving ColdWash™, built‑in AI, and ThinQ® connectivity makes it a strong choice for households that want efficient, powerful, and convenient laundry performance. While it doesn’t include steam cleaning and requires some familiarity with app‑based features, its overall balance of advanced tech and reliability makes it a highly capable washer for modern homes.
LG WM3420CW Specifications
| Width | |
| Exterior Width | 27" |
| Width | 27" |
| Depth | |
| Depth | 30 1/4" |
| Height | |
| Height | 39" |
LG WM3420CW Overview
Features:
- 4.5 cu. ft. Ultra Large Capacity lets you clean larger loads
- 6Motion™ technology uses different wash motions for a thorough clean
- With ColdWash™ technology, clean like warm and save like cold
- Built-in intelligence takes out the guesswork—AI technology selects optimal wash settings
- Get the ThinQ® app to access smart functions, ThinQ Care™ alerts and download new ThinQ UP™ features
- Direct Drive Motor 10-Year Limited Warranty
- ENERGY STAR Certified for an efficient clean that saves on water and energy
Why Buy LG WM3420CW 4.5 cu. ft. Ultra Large Capacity Smart Front Load Washer
- Ultra-large capacity: 4.5 cu. ft. drum handles bigger loads and bulky items like bedding, reducing the number of wash cycles.
- Advanced cleaning motion: 6Motion™ technology combines multiple wash motions for a thorough yet gentle clean.
- Energy-saving performance: ColdWash™ delivers the cleaning power of warm water while using cold water to save energy and protect fabrics.
- Smart wash automation: Built-in AI automatically selects optimal wash settings, taking the guesswork out of laundry.
- ThinQ® smart features: The ThinQ® app allows remote monitoring, cycle control, and access to new features through ThinQ UP™ updates.
- Durable motor: Direct Drive Motor with a 10-year limited warranty ensures long-lasting reliability.
- Efficient and cost-effective: ENERGY STAR® certification provides water and energy savings while maintaining excellent cleaning performance.
Frequently Asked Questions
Q: What is the washer’s capacity?
A: The WM3420CW features a 4.5 cu. ft. ultra-large drum, allowing you to wash larger loads and bulky items like bedding and towels in fewer cycles.
Q: What cleaning technologies does it use?
A: It uses 6Motion™ technology, which combines multiple wash motions tailored to different fabrics for a thorough yet gentle clean.
Q: How does ColdWash™ work?
A: ColdWash™ technology mixes advanced wash motions with cold water to deliver the cleaning performance of warm water while saving energy and protecting fabrics.
Q: What smart features does this washer have?
A: The washer has built-in AI that selects optimal wash settings automatically, and the ThinQ® app allows remote monitoring, cycle control, and access to new features via ThinQ UP™ updates.
Q: Is the washer energy-efficient?
A: Yes, it is ENERGY STAR® certified, providing water and energy savings while maintaining excellent cleaning performance.
Q: How reliable is the motor?
A: The Direct Drive Motor is backed by a 10-year limited warranty, offering long-term durability and peace of mind.
Q: Does it handle large or bulky items?
A: Yes, the ultra-large capacity drum combined with 6Motion™ technology makes it ideal for bulky loads like comforters, blankets, and towels.
Q: Can I troubleshoot issues myself?
A: Many minor issues can be diagnosed through the ThinQ® app, which provides alerts and guidance to help resolve problems quickly.
Pros and Cons of LG WM3420CW 4.5 cu. ft. Ultra Large Capacity Smart Front Load Washer
Pros
- Ultra‑large capacity: 4.5 cu. ft. drum handles large loads and bulky items like comforters and towels, reducing the number of wash cycles needed.
- Advanced cleaning technology: 6Motion™ uses multiple wash motions for tailored, effective cleaning across different fabric types.
- Energy‑saving wash: ColdWash™ delivers warm‑water cleaning performance using cold water, saving energy while protecting clothes.
- Smart automation: Built‑in AI automatically selects optimal wash settings, taking the guesswork out of cycle selection.
- ThinQ® smart features: Remote monitoring, cycle control, alerts, and feature updates through the ThinQ® app add convenience and connectivity.
- Durable motor: Direct Drive Motor with a 10‑year limited warranty offers reliable, long‑lasting performance.
- Efficient operation: ENERGY STAR® certification helps reduce water and energy use without compromising cleaning performance.
Cons
- No steam cleaning option: Lacks a dedicated steam cycle that some premium washers offer for deep stain removal.
- Smart features require app: Some users may find the ThinQ® app setup or operation less intuitive if not familiar with smart home technology.
- Front‑load maintenance: Like all front‑load washers, regular gasket and door seal cleaning are needed to prevent odor buildup.
Conclusion
The LG WM3420CW is a feature‑rich, smart front‑load washer that excels in capacity, cleaning technology, and intelligent operation. Its combination of large drum size, energy‑saving ColdWash™, built‑in AI, and ThinQ® connectivity makes it a strong choice for households that want efficient, powerful, and convenient laundry performance. While it doesn’t include steam cleaning and requires some familiarity with app‑based features, its overall balance of advanced tech and reliability makes it a highly capable washer for modern homes.
LG WM3420CW Specifications
| Width | |
| Exterior Width | 27" |
| Width | 27" |
| Depth | |
| Depth | 30 1/4" |
| Height | |
| Height | 39" |
LG WM3420CW Rebates
LG ThinQ Extended Limited 2 Year Warranty January 2026
ENJOY A 2 YEAR WARRANTY
on select LG appliances via the LG ThinQ® app at no cost (up to $185 value)*
Offer valid 1/1/26 – 4/8/26. Terms apply
LG WM3420CW Warranty & Returns
Warranty Information
1 Year Parts and Labor, 3 Years on Drum, 10 Years on Direct Drive Motor
Return Policy
Returns accepted within 30 days of delivery. Item must be in original packaging and unused condition.
LG WM3420CW Why Us
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If you find a lower price on an identical item from a local competitor or select online retailers, we will match it.