LG WT8400C / WT8600C top-load washers: quick sheet

Covers: LG WT8400C* (WT8400CW white, WT8400CB black) and WT8600C* (WT8600CB black steel, with ezDispense). ENERGY STAR lists both on the market from December 2023. 5.5 cu ft US (about 6.3 cu ft IEC on Canadian listings), 27 in wide impeller top-loaders. Newer than the WT7300CW and WT7800CW sheets.

Cross-checkedBrands: LG9 components

LG's 2023-24 large-capacity impeller top-loaders. Same inverter direct-drive layout LG has used for years, with TurboWash3D spray jets, an AI Wash cycle that senses load and fabric, NeveRust stainless drum and ThinQ Wi-Fi. The WT8600CB adds ezDispense (bulk detergent and softener reservoirs) and a built-in faucet/pre-treat water station. Fault codes and component tests: see the LG top-load direct-drive washer field service manual; LG publishes code meanings by model on its support site.

Safety first

Unplug before opening panels; inverter boards can hold a charge briefly after power off.
Live checks only when the test requires them, with insulated probes.
Drain and disconnect hoses before tipping; use two people (about 130 lb).
Never bypass the lid lock.

How it works

The control locks the lid, senses the load (LG calls this AI Sensing: volume, weight and fabric) and fills to a matched level. The pressure sensor reports level. TurboWash3D and the Jet Spray rinse use a circulation pump to spray water down onto the load.

The inverter direct-drive motor sits under the tub and turns the impeller (pulsator) for wash. A clutch assembly couples the basket for spin. The control varies motor direction and speed for its wash motions (LG markets 6Motion) and spins up to about 950 rpm.

On WT8600CB, ezDispense meters detergent and softener from bulk reservoirs into the wash, so dispensing complaints can come from the reservoirs, their pumps or a clogged path rather than the inlet valve. Both models run on a 120 V, 15 A outlet and have no internal heater.

Components & tests

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Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Basement laundry area with a top-load washer and dryer next to utility equipment by Đỗ Huy Hoàng, Pexels License

Diagnostic guides for this appliance

Guide · Washer

Whirlpool family washers & dryers: reading F#E# codes, Service Diagnostic Mode and fault history

Whirlpool-family electronic laundry stores its last few faults as a pair: the F number names the system and the E number names the suspect part. Most knob-and-button consoles reach Service Diagnostic Mode by pressing three buttons in a set order three times in a row within a few seconds; newer touch consoles use a different entry. The exact buttons are on the tech sheet hidden in the console, so read it first and never guess.

8 steps ~15 mineasy

Guide · Washer

Samsung washers & dryers: display codes vs information codes, SmartThings and Smart Care, and service-mode code history

Samsung splits codes into information codes (a user or installation condition such as swapped hot and cold hoses or an unlatched door) and real error codes. The same fault may read differently by generation: older machines used E-numbers or 4E-style codes, newer ones 4C-style, some top-loaders nF. Wi-Fi models push codes to SmartThings when they happen; Smart Care is a separate camera-based check that only reads its own test, not real codes. Many models also keep a stored-code list in a service mode whose buttons vary by model.

7 steps ~20 mineasy

Guide · Washer

Washer routine service: tub-clean cycle, door boot, dispenser, pump filter and hoses (front and top load)

All the major brands build in a cleaning cycle and remind the user about once a month or every 20-40 loads: Whirlpool about every 30 cycles, LG after about 30 cycles ('tcL'), Samsung after 40 washes on front-loaders and 20 on top-loaders. A pro service adds what the cycle misses: the door boot, dispenser, drain pump filter on front-loaders and a hose inspection.

6 steps ~45 mineasy

Other washers manuals

Manual · Washer

Whirlpool WTW6157P-series top-load washer with 2-in-1 removable agitator: quick sheet

Whirlpool WTW6157P** (WTW6157PW white, WTW6157PB Volcano Black; first engineering revision WTW6157PW0 seen in parts listings). ENERGY STAR lists it as available on the market from May 2023 (the 'P' letter is the 2023 model-year code in Whirlpool numbering). 5.3 cu ft US (DOE) class, about 6.1 cu ft IEC in Canada. The smaller WTW5057L** also carries a 2-in-1 removable agitator but differs in capacity (about 4.7-4.8 cu ft) and listed spin (about 770 rpm), and our sources do not confirm the two share the same agitator parts, so it is NOT covered here.

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Whirlpool WFW6720R / WFW5720R front-load washers with FreshFlow vent: quick sheet

Whirlpool WFW6720R** (5.0 cu ft US / 5.8 cu ft IEC; ENERGY STAR base model H24JAK50) and WFW5720R** (4.5 cu ft US / 5.2 cu ft IEC; base model H24JAL50). ENERGY STAR lists WFW5720R on the market from July 2024 and WFW6720R from August 2024 ('R' is the 2024 model-year letter). Paired dryers per ENERGY STAR: YWED6720R** (electric, with the 6720) and WGD5720R** (gas, with the 5720). This is a newer platform than the WFW5620H / WFW560CH sheet.

9 components7 common failuresWhirlpool

Manual · Washer

Maytag Pet Pro MVW6500M washer and MED6500M / MGD6500M dryer pair: quick sheet

Maytag Pet Pro System launched August 2022: washer MVW6500M** (MVW6500MW white, MVW6500MBK Volcano Black), electric dryer MED6500M** (YMED6500MW in Canada) and gas dryer MGD6500M**. The 'M' letter is the 2022 model-year code. Not found in the ENERGY STAR washer or dryer lists. Maytag later added front-load Pet Pro models (per a 2025 Maytag release); those are not covered here.

9 components7 common failuresMaytag