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® Certified |
| 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 voice control compatibility through Google Assistant and Amazon Alexa.
Direct Drive Motor
LG's innovative Direct Drive motor connects directly to the drum without belts or pulleys, reducing noise and vibration while increasing reliability and efficiency.
TurboWash™ 360°
Advanced cleaning technology that uses multi-directional powerful jets to thoroughly clean clothes in less time, saving up to 30 minutes per load.
Smart Diagnosis
Automatically diagnoses issues and provides troubleshooting guidance through the ThinQ app, making maintenance and repairs easier.
ColdWash™ Technology
Advanced cold water washing that provides excellent cleaning performance while saving energy and protecting fabric colors.
Allergiene™ Cycle
Special cycle that uses steam technology to remove over 95% of common household allergens like dust mites and pet dander.
Smart Features Explained
Remote Start
Start and monitor wash cycles from anywhere using your smartphone
Cycle Download
Download additional wash cycles and features through the ThinQ app
Usage Monitoring
Track energy and water usage to optimize efficiency and save money
Voice Control
Control your washer using voice commands with compatible smart assistants
Maintenance Alerts
Receive notifications when it's time to clean or maintain your washer
Firmware Updates
Automatic software updates to improve performance and add new features
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Washer won't connect to Wi-Fi | Network issues, incorrect setup | Check network connection, restart router, re-run setup process |
| App not responding | App update needed, connection lost | Update ThinQ app, check internet connection, restart phone |
| Remote start not working | Network connectivity, cycle restrictions | Ensure stable connection, check if cycle supports remote start |
| Voice commands not recognized | Smart assistant setup, microphone issues | Re-link LG skill, check smart device microphone |
| Software update failed | Network instability, insufficient storage | Ensure stable connection, restart update process |
| Smart features unavailable | Server maintenance, account issues | Check LG service status, verify account login |
Smart Feature Error Codes
- SE: Smart feature error - Check network connection
- NE: Network connection failed - Restart router and washer
- AE: App connection error - Update ThinQ app
- VE: Voice control error - Re-link smart assistant
- UE: Update error - Check internet connection
- CE: Communication error - Restart smart features
Manual Downloads
Current ThinQ Models
WM3900HWA
4.5 cu.ft. Smart Washer
WM4000HBA
4.8 cu.ft. ThinQ Washer
WM4200HWA
5.0 cu.ft. Smart Combo
WM9000HVA
5.8 cu.ft. Premium ThinQ
Popular ThinQ Series
WM3700HWA
4.5 cu.ft. ThinQ Washer
WM3488HW
4.5 cu.ft. Smart Control
WM3900HWA
4.5 cu.ft. Center Control
WM4000HBA
4.8 cu.ft. Large Capacity