LG WM3900HWA Repair Guide
LG’s high selling front loader with the direct drive inverter motor (no belt) and a 10-year motor warranty. The motor itself almost never fails, LG service calls concentrate on drainage, the door boot, and eventually bearings on heavily used units.
LG WM3900HWA is a front load washer, direct drive washer sold 2019 to present. Its most common repair is oe error / stops full of water, usually $0 to $280.
- 5 common problems with causes, fixes and costs below.
- 6 error codes decoded.
- A washer like this lasts about 10 to 14 years.
- OEM part numbers listed and checked against two suppliers.
Common problems & typical repair costs
| Problem | Likely cause | Typical fix | OEM part # | Typical cost |
|---|---|---|---|---|
| OE error / stops full of water | Drain pump filter clogged or pump failure | Clean front filter. Replace pump if humming/dead | 4681EA2001Treplaces 4681EA2001D, 2003273 | $0 to $280 |
| LE error | Locked motor, overload, or hall sensor/stator connection | Reduce load. Replace the stator assembly if it persists | AJB73816028⚠ No standalone hall sensor on this model, it is part of the stator. 6501KW2002A does NOT fit. | $120 to $250 |
| Rumbling spin, oil under machine | Tub bearings/seal | Bearing job, labor heavy on this design | not listed | $300 to $500 |
| UE constant unbalance | Worn shocks or unlevel machine | Level. Replace shock absorbers | not listed | $0 to $280 |
| Musty smell / boot mold | Door kept latched between loads | Clean or replace boot | not listed | $0 to $350 |
Costs are national averages for professional repair (parts + labor). See the linked cost guides below for full breakdowns.
Error codes
| Code | What it means |
|---|---|
| OE | Drain error, filter, pump, or hose |
| IE | Fill error, taps, screens, inlet valve |
| LE | Locked motor / hall sensor |
| UE / uE | Unbalanced load (uE = machine self correcting) |
| dE | Door open / lock fault |
| tE | Thermistor (heater temp sensor) fault |
Tech notes
The direct drive motor is warrantied for 10 years, if a shop blames the motor, make sure they check the hall sensor and wiring first, and ask about LG’s parts warranty before paying for one.
Sources
Where the safety, regulatory and warranty claims on this page come from. Repair costs are our own figures based on Arizona market rates and OEM parts pricing.
- Electrical Safety U.S. Consumer Product Safety Commission Shock and electrical fire hazards from damaged appliance wiring and grounding faults.
- Refrigerator Limited Warranty (PDF) LG Electronics U.S.A. Compressor and sealed system warranty terms, including which years cover labor.
Cost guides for this machine’s common repairs
DIY step by step instructions for this model
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