Installation Guide
Tools Needed:
- Adjustable wrench
- Level tool
- Screwdrivers set
- Pliers
- Measuring tape
Step-by-Step Installation
- Select Location: Choose a level, solid floor near water and electrical connections.
- Remove Packaging: Remove all shipping materials and transit bolts from the washer.
- Water Connections: Connect hot and cold water lines to inlet valves using new hoses.
- Drain Setup: Route drain hose into standpipe with high loop to prevent siphoning.
- Power Connection: Connect to grounded 120V, 60Hz outlet. Avoid extension cords.
- Level Adjustment: Adjust leveling feet to ensure machine is perfectly level.
- Initial Test: Run complete cycle to verify proper operation and check for leaks.
Specifications
| Model Series | WM3900HWA |
| Type | Front Load Smart Washer |
| Color | Graphite Steel / White |
| Capacity | 4.5 cu. ft. |
| Noise Level | 50 dB / 68 dB |
| Control System | Touch Controls with LED Display |
| Energy Rating | ENERGY STAR® Certified |
| Water Usage | 13 gallons per cycle |
| Power Requirements | 120V, 60Hz, 15A |
| Dimensions | 39 x 27 x 30 inches |
| Weight | 185 lbs |
| Spin Speed | 1300 RPM |
Warranty Information
- Full Warranty: 1 year parts and labor
- Motor Warranty: 10 years on Direct Drive Motor
- Extended Options: Available extended warranty plans
Contact LG Support at 1-800-243-0000 or visit LG.com/support for warranty service.
Key Features
ThinQ Technology
Smart connectivity allows remote control, cycle monitoring, and custom program downloads via smartphone app and voice assistants.
Direct Drive Motor
Brushless motor directly connected to drum for quieter operation, better balance, and increased durability with fewer moving parts.
TurboWash™ 360°
Advanced spray system cleans full loads in under 30 minutes using multi-directional water jets and optimized drum movements.
Steam+™ Technology
Steam cycles remove tough stains, reduce allergens, and refresh clothes without full washing cycles.
Smart Diagnosis
Automated troubleshooting via ThinQ app identifies issues and provides solutions without service calls.
ColdWash™ Technology
Advanced cold water washing delivers warm-water cleaning performance while saving energy and protecting fabrics.
Smart Features Overview
Remote Start
Start and monitor wash cycles from anywhere using smartphone app
Cycle Tracking
Real-time notifications for cycle completion and maintenance alerts
Voice Control
Compatible with Amazon Alexa and Google Assistant for hands-free operation
Software Updates
Automatic updates for new features and performance improvements
Energy Monitoring
Track energy and water usage through the ThinQ application
Custom Programs
Download specialized wash cycles for specific fabric types and needs
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Washer not starting | Power disruption, door ajar, child lock engaged | Check power source, ensure door closure, disable child lock |
| Incomplete cleaning | Overloading, incorrect detergent, wrong cycle selection | Reduce load size, use HE detergent, select proper cycle |
| Water drainage issues | Clogged drain hose, pump obstruction, kinked hose | Clear drain path, check pump filter, straighten hose |
| Water leakage | Loose connections, damaged seal, over-sudsing | Tighten connections, inspect door seal, reduce detergent |
| Unusual sounds | Foreign objects, unbalanced load, worn components | Check drum for objects, balance load, inspect parts |
| Excessive vibration | Uneven floor, load imbalance, improper leveling | Level machine, redistribute load, check installation |
Common Error Codes
- IE: Water inlet error - Check water supply and pressure
- OE: Drainage error - Inspect drain hose and pump
- FE: Flood detection - Check for leaks and overflows
- LE: Motor lock - Contact service technician
- dE: Door error - Ensure proper door closure
- UE: Unbalance error - Redistribute laundry load
Manual Downloads
Current ThinQ Models
WM3900HWA
4.5 cu.ft. ThinQ Washer
WM4000HBA
4.8 cu.ft. ThinQ Washer
WM4200HWA
5.0 cu.ft. ThinQ Washer
WM4500HBA
5.2 cu.ft. ThinQ Washer
Previous ThinQ Models
WM3700HWA
4.5 cu.ft. Smart Washer
WM3470HVA
4.5 cu.ft. Connected Washer
WM3170CW
4.3 cu.ft. Smart Washer
WM3070CW
4.2 cu.ft. Connected Washer