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Why this brand stands out for our shoppers
Iconic & Trusted
One of America's most recognizable brands with extremely good service support coast to coast.
Top Rated Favorite
Consumer Reports standouts across laundry and refrigeration that shoppers consistently love.
Low Returns
Fan-favorite reliability keeps return rates low across LG's broad appliance lineup.
Features:
Why Buy LG WM3420CW 4.5 cu. ft. Ultra Large Capacity Smart Front Load Washer
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
Cons
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.
| Width | |
| Exterior Width | 27" |
| Width | 27" |
| Depth | |
| Depth | 30 1/4" |
| Height | |
| Height | 39" |
Features:
Why Buy LG WM3420CW 4.5 cu. ft. Ultra Large Capacity Smart Front Load Washer
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
Cons
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.
| Width | |
| Exterior Width | 27" |
| Width | 27" |
| Depth | |
| Depth | 30 1/4" |
| Height | |
| Height | 39" |

LG ThinQ 1+1 Year Limited Warranty Promotion
Enjoy a total of 2 year limited warranty on select LG appliances
Purchase an eligible LG-branded product(s) between April 9 - 12/31/2026 and you may be able to redeem an additional 1 year limited warranty with the ThinQ app (valued at $185)
See Rebate for more details
May take up to 14 days for registered product warranty to reflect 2 years on the LG ThinQ app
1 Year Parts and Labor, 3 Years on Drum, 10 Years on Direct Drive Motor
Returns accepted within 30 days of delivery. Item must be in original packaging and unused condition.
Split your purchase into easy payments over time—interest-free or with simple interest depending on your plan and eligibility.
We offer free in-home delivery to most serviceable zip codes for orders over $799.
Free Standard Installation
Free 1 Year Extended Warranty
Bonus Rewards
Manufacturer rebates, instant savings, and product discounts — all in one place.
Choose a 3- or 5-year protection plan—get 50% back if you don't use it.
If you find a lower price on an identical item from a local competitor or select online retailers, we will match it.