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 | White / Graphite 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 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
Wi-Fi Connectivity
Connect your ThinQ washer to your home Wi-Fi network for remote control and monitoring via the LG ThinQ mobile app.
Voice Control
Compatible with Amazon Alexa and Google Assistant for hands-free control of your washing machine.
Smart Diagnosis
Advanced diagnostic system that can identify issues and provide solutions through the ThinQ app.
Cycle Download
Download additional wash cycles and features directly to your washer through the ThinQ app.
Remote Start/Stop
Start, stop, or pause wash cycles remotely from your smartphone or tablet.
Usage Monitoring
Track energy and water usage through the ThinQ app to optimize efficiency and reduce costs.
Smart Features Explained
Remote Monitoring
Check cycle status and receive notifications when your laundry is done
Voice Commands
Use voice commands to start cycles, check status, or get help
Smart Settings
Automatically adjust settings based on fabric type and soil level
Maintenance Alerts
Receive notifications when it's time to clean or maintain your washer
Energy Reports
View detailed reports on energy and water consumption
Software Updates
Automatic updates to keep your washer running with the latest features
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Wi-Fi connection issues | Network problems, incorrect setup | Check network connection, re-run setup wizard in ThinQ app |
| App not connecting | Server issues, app version outdated | Update ThinQ app, check LG server status, restart app |
| Voice control not working | Device compatibility, skill not enabled | Ensure device compatibility, enable LG ThinQ skill in assistant app |
| Remote control disabled | Network outage, washer offline | Check internet connection, ensure washer is connected to Wi-Fi |
| Software update failed | Poor connection, insufficient storage | Improve Wi-Fi signal, ensure adequate memory space |
| Smart features unavailable | Service outage, account issues | Check LG service status, verify ThinQ account login |
Smart Error Codes
- SE: Smart Error - Check network connection and restart
- WE: Wi-Fi Error - Reconnect to home network
- AE: App Error - Update or reinstall ThinQ app
- VE: Voice Error - Check voice assistant settings
- UE: Update Error - Check internet connection for software updates
- CE: Connection Error - Reset network settings on washer
Manual Downloads
Current ThinQ Model Manuals
WM3900HWA
4.5 cu.ft. Smart Washer
WM4000HBA
5.0 cu.ft. ThinQ Washer
WM4200HWA
4.8 cu.ft. Smart Control
WM4500HBA
5.2 cu.ft. AI Washer
Popular ThinQ Series
WM3700HWA
4.5 cu.ft. Smart Washer
WM3488HW
4.2 cu.ft. ThinQ Washer
WM3575HVA
4.5 cu.ft. Smart Control
WM3998HWA
4.8 cu.ft. AI Washer