Front-load washer and dryer pair in a home laundry room
9 components covered

Field manual · Washer

LG front-load direct-drive washer: field service manual

Covers: LG WM-series front-loaders with direct-drive (rotor/stator) motor, roughly 2004 onward.

Cross-checkedBrands: LG9 components

LG front-loaders bolt the motor rotor directly to the drum shaft at the back of the tub, with no belt. The main board drives the stator and reads rotor position from a hall sensor mounted on the stator. The motor-related LE (locked motor) code is the signature fault of this platform, and the hall sensor has published test values that agree across sources.

Safety first

  • Unplug and wait several minutes before touching motor leads: the motor phase lines are driven at high DC voltage by the board.
  • Never measure voltage on the motor phase wires; take only hall-sensor voltage readings with power on.
  • Keep fingers clear of the rotor when turning it by hand during live hall checks; do not press Start.

How it works

Start: the board checks the door switch and locks the door; a lock failure shows dE/dE1/dE2.

Load sensing: the drum is turned dry to estimate load before filling.

Fill: inlet valve solenoids admit water through the dispenser. The pressure sensor (frequency output) tells the board the level; no rise in time gives IE, overfill gives FE.

Wash: the drum tumbles in alternating directions; on heater models a heater and thermistor control temperature (tE for sensor faults).

Drain: the pump at the front-bottom runs; slow drain gives OE.

Balance and spin: the board ramps speed in steps and reads speed ripple from the hall sensor to judge imbalance. It redistributes and retries; if it cannot balance it shows UE and spins slowly or not at all.

Motor monitoring: if the hall sensor does not report rotation when the motor is driven, the board shows LE; motor over-current shows CE.

Door release: after the drum stops and level is low, the lock releases.

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): Front-load washer and dryer pair in a home laundry room by Curtis Adams, Pexels License

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LG front-load direct-drive washer: field service manual · OnCall Tech