LG LDP6797 QuadWash top-control smart dishwasher (LDP6797ST / BD / SS / WW): quick sheet

Covers: LG LDP6797** 24-inch top (hidden) control, Wi-Fi (ThinQ) dishwasher: ST (stainless), BD (black stainless), SS (smudge-resistant stainless) and WW (white, discontinued); Abt also lists LDP6797BSS. Years approx. 2017-2024 (inferred from LG spec sheets dated 2017-2018; LG now lists LDPS6762S as a newer similar model). No TrueSteam on this model. Model and serial are on the label on the door edge or tub side. A build-date reading was not confirmed by two sources here; see the guide find-model-and-serial-number-on-any-appliance.

Cross-checkedBrands: LG9 components

LG's mid-line QuadWash unit: 15 place settings, 44 dB, NeveRust stainless tub, inverter direct-drive wash motor (10-year LG motor warranty), Vario Wash, 3-stage filter, height-adjustable upper rack with a third rack and Hybrid Condensing drying. LG two-letter codes (OE, IE, AE, HE, tE, LE, nE) apply.

Safety first

Switch off the circuit and close the water before removing the kick plate or pulling the unit.
Hardwired units: open the junction box only with the breaker off and verified dead.
Water in the sump may be hot right after a cycle.
Live-voltage checks at the valve, pump, heater or board are caution work.
Watch for broken glass in the filter and sump.
Flood risk: keep towels down and confirm no leaks after reconnecting.

How it works

Wash: the inverter direct-drive motor turns the wash pump with no belt. QuadWash arms rotate and swing at the same time; LG Canada lists three spray arms (top, upper, lower) with five levels of water direction.

Vario Wash and Dual Zone: a motor/valve changes spray pressure and splits the lower rack into zones; a fault, or a dish reaching the sump, sets nE.

Sensing: soil (turbidity) sensor for Auto (SenseClean).

Heat and dry: hidden heater under the tub; Hybrid Condensing drying with Extra Dry and Night Dry options.

Drain and protection: drain pump (OE if slow); leak float in the base pan (AE); LG asks that the drain hose end be held about 12 in above the floor.

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): Built-in dishwasher with the door open and racks pulled out by Castorly Stock, Pexels License

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