LG Dishwasher Repair in Toronto — Not cleaning / dishes still dirty

• nE is a real LG dishwasher code, but it is the vario/DIVERTER-motor fault, not a wash-pump fault: it means the small geared diverter motor that switches water between the lower, middle and upper spray arms has stopped reporting that it is turning. LG throws nE when the diverter-motor windings fail (spec ~2.7-4.0 kOhm), the diverter position microswitch is misaligned or dead, the wiring is bad, or the main PCB isn't seeing the position signal -- most commonly when debris fouls the diverter valve rather than anything jamming the wash impeller. We meter the diverter motor coil and test the position-switch plunger before quoting; the correct fix is the inexpensive vario/diverter motor assembly 4681ED3001D (AP5243567 / PS3579323, replaces 2020847 / 4681ED3001B), NOT the circulation pump. nE on its own does not point to the ABT72989206 wash motor.
• LE / CE is the genuine wash-pump dirty-dishes fault on this LG platform: LG groups LE/CE as a motor error -- the single circulation (wash) motor, the motor-to-control wiring harness, or over-current in the motor circuit (CE specifically flags excess current from a stalled motor, short, loose connection, ground fault or surge). When the inverter direct-drive circulation motor seizes or stalls, the unit makes wash noise but never builds spray pressure, so soil is never blasted off and the code latches mid-cycle. A hard object that got past the dual sump strainer (glass chip, fruit pit, cherry stone, bone) jamming the wash impeller, or a coil that won't read continuity, is the classic LE/CE cause. We confirm it's the motor and not just debris by spinning the rotor and metering the windings before quoting the circulation/wash pump+motor assembly ABT72989206 (AP6334593, supersedes 4870745 / ABT72989202; PS12579574 / AP6334593 are its current cross-reference IDs, not superseded numbers), which is the same casing that carries the integrated heater on QuadWash LDF/LDT/LDP tubs. LG runs ONE wash motor (ABT72989206) and ONE separate drain pump (ABQ73503004) -- they are not interchangeable.
• The single most common 'dirty dishes' that isn't an error code at all is a clogged mesh filter. LG's QuadWash sump uses a coarse strainer over a fine mesh filter cup (current part ADQ32598202; AP4997596, supersedes 1366944 / AH3531957 / PS3531957 on the LDF/LDS 6810/6920/7810/7920 families), and LG's own maintenance flow says to clean it monthly or whenever wash performance drops. When it cakes with grease and food, the pump recirculates dirty water and re-deposits grit, so 'clean' dishes come out gritty and filmed. We pull, degrease and reseat the filter and clean the sump before condemning any part -- a clean rinse afterward means no part was ever needed.
• Blocked spray-arm jets are a classic LG dirty-dishes pattern, especially with Toronto's moderately hard water. The lower spray arm (nozzle assembly AGB73932401; AP6233774, supersedes 4505818 / PS12078485, the QuadWash four-arm style) and the upper arm carry rows of tiny jets that mineral scale, seeds and label adhesive plug over time; a partially blocked arm sprays unevenly and leaves whole sections of the load soiled. We clear the jets with a pin and confirm both arms spin freely on their feed; a cracked hub or split arm that can't hold pressure gets the AGB73932401, but most are just cleaned.
• An IE (inlet/fill) condition presents as dirty dishes long before it ever shows the IE banner. LG needs a proper fill to pressurize the spray system; a water inlet valve (5221DD1001F; PS9495756 / AP5810251) clogged with hard-water scale at its inlet screen, or low supply pressure under ~20 psi, lets the unit underfill so the spray runs weak and the soil sensor short-cycles. The dishes come out under-washed without a hard fault. We check fill volume and clean or replace the 5221DD1001F valve screen rather than chasing the wash motor when the symptom is weak, not no, water.
• Rinse-aid and loading are LG's own first stop on a not-cleaning call, and on Toronto's moderately-hard supply (~121 mg/L as CaCO3) they're the most frequent fix. An empty or turned-down rinse-aid dispenser leaves white film and water spots that read as 'dirty,' and overlapping/nested dishes or items overhanging the lower arm block the spray. We top and set the rinse-aid, correct the load, and run a hot cycle -- LG's not-cleaning flow puts this ahead of any parts call, and it saves the customer a needless dispatch.
• A chopped-food / sump-debris fault is distinct from a filter clog: LG dishwashers don't have a hard-food disposer like some brands, so anything that defeats the strainer recirculates as grit until it's manually fished out. Glass shards, toothpicks and large seeds collect in the sump and get sprayed back onto the load, and the same debris is what eventually migrates into the circulation/wash impeller to throw the LE/CE motor code. We clear the sump cavity by hand and run a rinse to confirm the water comes back clean before we look at the ABT72989206 wash motor or the AGB73932401 spray arm.

LG not cleaning / dishes still dirty in Toronto — the local specifics

• The recurring LG-in-Toronto dishes-dirty pattern we see is the maintenance miss, not the dead part: owners who've never pulled the QuadWash mesh filter (ADQ32598202) and let it cake, combined with empty rinse-aid on the moderately-hard city water, account for the bulk of 'my LG stopped cleaning' calls -- a filter degrease, jet clean-out and rinse-aid reset fixes most before any part is opened. The genuine-fault subset splits two ways: the LE/CE wash-motor jam (almost always a glass chip or pit that slipped past the strainer and locked the circulation impeller), and the separate nE vario/diverter-motor fault (a failed diverter coil or position microswitch that we meter before quoting).
• We roll these Toronto dishes-dirty calls carrying the cheap fast-movers -- mesh filter ADQ32598202, lower spray arm AGB73932401, water inlet valve 5221DD1001F, and the vario/diverter motor 4681ED3001D for an nE -- plus rinse-aid and a sump/jet clean-out kit, so most are one-visit. The ABT72989206 circulation/wash pump+motor (the LE/CE part) we bring only after confirming a jammed-or-seized rotor by model code, since it's the larger casing part and not interchangeable with the ABQ73503004 drain pump.

For the full LG dishwasher module — every fault, part number and code — see LG dishwasher repair in Toronto, and for the same fault across all brands the dishwasher not cleaning / dishes still dirty guide.