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 | Black Stainless Steel |
| Capacity | 4.5 cu. ft. |
| Noise Level (Wash/Spin) | 52 dB / 68 dB |
| Control Type | Touch Controls with LCD Display |
| Energy Rating | ENERGY STAR® Most Efficient |
| Water Consumption | 13.7 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
AI Technology
LG's AI technology automatically detects fabric types and load size to optimize wash cycles for the best cleaning performance and energy efficiency.
ThinQ Smart Technology
Connect to your home Wi-Fi to control your washer remotely, receive cycle completion alerts, and download new wash cycles via the LG ThinQ app.
TurboWash™ 360°
Five powerful jets spray water and detergent in multiple directions to penetrate fabrics thoroughly, cleaning a full load in just 30 minutes.
Allergiene™ Cycle
This cycle uses steam to remove over 95% of common household allergens like dust mites and pet dander, certified by the Asthma and Allergy Foundation of America.
ColdWash™ Technology
Advanced technology that provides effective cleaning in cold water, saving energy while still removing tough stains.
Smart Diagnosis™
Quickly diagnose issues using the LG ThinQ app or by calling customer service, making troubleshooting fast and easy.
Smart Features Explained
Voice Control
Compatible with Google Assistant and Amazon Alexa for hands-free operation
Cycle Download
Download additional wash cycles as they become available through the ThinQ app
Remote Start
Start wash cycles from anywhere using your smartphone
Usage Monitoring
Track energy and water usage to optimize efficiency and reduce costs
Maintenance Alerts
Receive notifications when it's time to clean the filter or perform other maintenance
Firmware Updates
Automatic updates keep your washer performing at its best with the latest features
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Washer won't connect to Wi-Fi | Network issues, incorrect password, signal strength | Check network connection, verify password, move router closer |
| App not responding | App needs update, phone compatibility issues | Update ThinQ app, check phone compatibility, restart app |
| Voice commands not working | Connection issues, incorrect phrasing | Check device connections, use proper command phrases |
| Remote start failed | Network connectivity, door not closed | Check internet connection, ensure door is properly closed |
| Smart features unavailable | Firmware outdated, server maintenance | Update firmware, check LG server status |
| Cycle download failed | Network issues, storage limitations | Check internet connection, clear app cache |
Smart Error Codes
- SE: Smart Error - Check network connection and restart washer
- CE: Communication Error - Verify Wi-Fi settings and signal strength
- AE: App Error - Update ThinQ app or reinstall
- FE: Firmware Error - Check for available updates
- NE: Network Error - Reset network connections
- VE: Voice Control Error - Check voice assistant settings
Manual Downloads
Current ThinQ Models
WM3900HWA
4.5 cu.ft. Smart Washer
WM4000HBA
4.5 cu.ft. Black Washer
WM4200HWA
5.0 cu.ft. Smart Washer
WM4500HBA
5.0 cu.ft. Black Washer
Popular ThinQ Models
WM3900HWA
4.5 cu.ft. Stackable
WM3400CW
4.5 cu.ft. Compact
WM3700HWA
4.2 cu.ft. Smart Washer
WM3900HCA
4.5 cu.ft. Graphite