Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
Step-by-Step Installation
- Choose Installation Location: Select a location near necessary plumbing and electrical connections on a solid, level floor.
- Remove Shipping Materials: Remove all shipping bolts and packaging materials from the washing machine.
- Connect Water Supply: Connect hot and cold water supply lines to the water inlet valves. Use only new hoses.
- Connect Drain Hose: Route the drain hose into a standpipe or laundry tub with a high loop to prevent backflow.
- Electrical Connection: Connect to a properly grounded 120V, 60Hz, AC only outlet. Do not use an extension cord.
- Level the Washing Machine: Adjust the leveling legs to ensure the washing machine is level from front to back and side to side.
- Test Run: Run the washing machine through a complete cycle to check for leaks and proper operation.
Specifications
| Model Series | WM3900HWA |
| Type | Front Load Washing Machine |
| Color | Graphite Steel / White |
| Capacity | 4.5 cu. ft. |
| Noise Level (Wash/Spin) | 52 dB / 68 dB |
| Control Type | Touch Controls with LED Display |
| Energy Rating | ENERGY STAR® Most Efficient |
| Water Consumption | 13 gallons per cycle |
| Power Requirements | 120V, 60Hz, 15A |
| Dimensions (HxWxD) | 39 x 27 x 30 inches |
| Weight | 185 lbs |
| Max Spin Speed | 1300 RPM |
Warranty Information
- Full Warranty: 1 year parts and labor
- Motor Warranty: 10 years on Direct Drive Motor
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
ThinQ Technology
Smart connectivity allows remote control and monitoring via smartphone app, with AI-based cycle recommendations and diagnostic capabilities.
AI Direct Drive Motor
Artificial intelligence optimizes washing motions based on fabric type and load size, providing superior cleaning while being gentle on clothes.
Smart Diagnosis
Automatically detects issues and provides troubleshooting guidance through the ThinQ app, reducing service calls and downtime.
Voice Control
Compatible with Google Assistant and Amazon Alexa for hands-free operation and status updates.
TurboWash™ 360°
Advanced washing technology that cleans full loads in under 30 minutes using multi-directional water jets and optimized drum movements.
ColdWash™ Technology
Provides effective cleaning in cold water, saving energy while maintaining cleaning performance and fabric care.
Smart Features Explained
Remote Start
Start cycles remotely from your smartphone or voice assistant
Cycle Monitoring
Monitor cycle progress and receive completion alerts on your phone
Usage Statistics
Track energy and water usage over time for better efficiency
Firmware Updates
Automatic software updates with new features and improvements
Custom Cycles
Create and save custom washing programs for specific needs
Maintenance Alerts
Receive notifications for filter cleaning and maintenance tasks
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Wi-Fi connection issues | Network problems, incorrect setup | Check network connection, re-run setup in ThinQ app |
| App not connecting | Server issues, app version outdated | Check LG server status, update ThinQ app to latest version |
| Voice control not working | Skill not enabled, device offline | Enable LG skill in assistant app, check device online status |
| Smart diagnosis failure | Connection issue, microphone problem | Ensure good connection, check phone microphone permissions |
| Remote start not available | Child lock enabled, door open | Disable child lock, ensure door is properly closed |
| Firmware update failed | Weak Wi-Fi signal, power interruption | Improve Wi-Fi signal, ensure stable power during update |
Smart Error Codes
- tE: ThinQ connection error - Check Wi-Fi and restart setup
- SE: Sensor error - Run diagnostic through ThinQ app
- CE: Communication error - Restart machine and router
- WE: Wi-Fi module error - Contact service center
- AE: App connection error - Reinstall ThinQ app
- VE: Voice control error - Re-link with voice assistant
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
WM9000HVA
5.8 cu.ft. ThinQ Washer
Popular ThinQ Models
WM3700HWA
4.5 cu.ft. Smart Washer
WM3800HWA
4.5 cu.ft. AI Washer
WM3900HBA
4.5 cu.ft. Black Washer
WM4000HWA
4.8 cu.ft. White Washer