LG lists both WT7400CW and WT8400CW as 5.5 cu. ft. impeller washers with TurboWash3D. Compare their documented height, cycle selection and ColdWash option before checking actual loading access, installation and the offered unit.
Equal capacity doesn’t make these the same washer
Match the full U.S. model and suffix on the offered appliance. This comparison covers WT7400CW and WT8400CW, not every LG 5.5 cu. ft. washer, an agitator version or another country’s capacity rating.
LG’s checked WT7400CW page displays a “New Model Available” notice. That doesn’t establish stock at your seller or the condition of a particular unit. Confirm the actual model, availability and written offer before choosing.
Compare the documented differences
| Check | WT7400CW | WT8400CW |
|---|---|---|
| Listed capacity / mechanism | 5.5 cu. ft. / impeller | 5.5 cu. ft. / impeller |
| TurboWash3D | Listed | Listed |
| Cabinet width × height × depth | 27 × 44½ × 28⅜ inches | 27 × 43 × 28⅜ inches |
| Listed cycle count | 8 | 8 |
| Selected named programs | Delicates; Pre Wash+Normal | AI Wash; Quick Wash |
| ColdWash option | Yes | No |
The shared count hides different choices. The WT8400 sheet’s complete listed program set doesn’t name Delicates. Don’t substitute AI Wash, Quick Wash or a downloaded program without checking the exact owner’s instructions and the item’s care label.
“ColdWash: No” doesn’t mean WT8400CW can’t wash with cold water. Its sheet lists Cold among its wash/rinse temperatures. A branded option and a temperature choice are separate settings.
Check reach and full installation separately
WT8400CW’s listed cabinet is 1½ inches shorter while the stated width and depth match. LG promotes its EasyUnload design, but neither that name nor cabinet height proves that you can comfortably reach your laundry.
Try loading access and the controls on the actual model when possible. Check the delivery route, lid-opening space, wall clearances, floor support and electrical, water and drain requirements against its installation instructions. The table gives cabinet dimensions, not a complete installed envelope.
Both models have the same listed volume. That doesn’t establish identical item-loading permission, a universal comforter size or better cleaning. Match your usual loads to each manual and their care labels.
Choose from the feature you actually need
- You depend on Delicates or ColdWash: WT7400CW’s reviewed sheet explicitly lists them. Confirm the exact cycle and option combinations in the applicable manual before buying.
- You want AI Wash or a lower cabinet: WT8400CW documents those differences. Check its control workflow and your actual reach instead of treating AI as a cleaning-performance guarantee.
- You only need 5.5 cu. ft.: capacity alone doesn’t resolve this comparison. Compare access, required programs and a complete dated offer.
Request the exact washer’s condition, delivery, installation, accessories, removal and written return/service terms together. Verify warranty eligibility for that purchase; a motor warranty headline isn’t full-machine coverage. Leave a choice unresolved if the needed cycle, fit or offer terms can’t be verified.
Find LG documents and support · Verify listed capacity · Compare loading configurations
Sources and applicability
- WT7400C_ LG Builder specification sheet, June 2022: U.S. WT7400CW White variant explicitly listed; dated specification, no current stock or complete installation approval.
- WT8400C_ U.S. specification sheet: WT8400CW Alpine White variant explicitly listed; no absence inferred from omitted feature rows.
- WT7400CW U.S. product record: Exact U.S. model identification and observed product-page notice only; no local stock promise.
- WT8400CW U.S. product record: Exact U.S. model features; marketing comfort claim does not establish personal reach or performance.
Reviewed October 17, 2026. Exact model documents and actual purchase terms govern. No installed price, stock guarantee, performance ranking or universal loading permission is supplied.