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 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
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 powerful jets and multi-directional spraying to clean clothes thoroughly in less time.
Steam Technology
Steam technology helps to remove tough stains, reduce allergens, and minimize wrinkles, leaving clothes fresh and hygienically clean.
Smart Diagnosis
Advanced diagnostic system that can identify issues and provide solutions through the ThinQ app or by sound analysis.
ColdWash™
Optimized cold water washing that provides excellent cleaning performance while saving energy and protecting fabrics.
Smart Features Explained
Remote Start
Start wash cycles remotely from your smartphone or voice assistant
Cycle Monitoring
Monitor cycle progress and receive notifications when cycles complete
Download Cycles
Download additional wash cycles and settings through the ThinQ app
Energy Monitoring
Track energy and water usage to optimize efficiency and save resources
Usage Statistics
View detailed statistics about your washing habits and patterns
Maintenance Alerts
Receive notifications for filter cleaning and maintenance requirements
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Washing machine won't start | Power issue, door not closed properly, Wi-Fi connectivity | Check power supply, ensure door is latched completely, verify internet connection |
| Poor cleaning results | Overloading, wrong detergent, incorrect program | Reduce load size, use correct detergent, select appropriate program |
| Water not draining | Drain hose clogged or kinked | Check drain hose for obstructions or kinks, clean filter |
| Leaking water | Door not sealed, overfilling, loose connections | Check door seal, ensure proper detergent amount, check connections |
| Unusual noises | Foreign objects in drum, unbalanced load | Check for foreign objects, redistribute load evenly |
| ThinQ app not connecting | Wi-Fi issues, app configuration, network settings | Check Wi-Fi signal, reinstall app, verify network compatibility |
Error Codes
- IE: Water supply issue - Check water supply and inlet valve
- OE: Drain issue - Check drain hose and pump
- FE: Flooding detected - Check for leaks and water supply
- LE: Motor issue - Contact service center
- dE: Door not closed properly - Ensure door is fully closed
- UE: Unbalanced load - Redistribute clothes and restart
- tE: ThinQ connectivity error - Check network connection
Manual Downloads
Current ThinQ Model Manuals
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 Series
WM3700HWA
4.5 cu.ft. Smart Washer
WM3800HWA
4.5 cu.ft. AI Washer
WM3900HBA
4.5 cu.ft. Graphite Washer
WM4000HWA
4.8 cu.ft. White Washer