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) | 51 dB / 68 dB |
| Control Type | Touch Controls with LCD Display |
| Energy Rating | ENERGY STAR® Most Efficient |
| Water Consumption | 13.5 gallons per cycle |
| Power Requirements | 120V, 60Hz, 15A |
| Dimensions (HxWxD) | 39 x 27 x 30 inches |
| Weight | 205 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
SmartThinQ Technology
Connect your washer to your home Wi-Fi network to monitor cycles, download new wash cycles, receive end-of-cycle alerts, and diagnose issues remotely via the LG ThinQ app.
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°
This feature saves time without compromising cleaning performance, washing a full load in just 30 minutes using powerful jet sprays and optimized drum rotations.
Steam Technology
Steam technology helps to remove tough stains, reduce allergens, and minimize wrinkles, leaving clothes fresh and hygienically clean.
6 Motion DD Technology
Six different wash motions can be combined to provide the optimal wash for any fabric type, from gentle handling of delicates to powerful cleaning of heavily soiled items.
Voice Control
Compatible with Amazon Alexa and Google Assistant for voice-controlled operation, allowing you to start, stop, or check cycle status with simple voice commands.
SmartThinQ App Features
Remote Start/Stop
Start or stop wash cycles from anywhere using your smartphone
Cycle Monitoring
Monitor cycle progress and receive notifications when cycles complete
Diagnostics
Run diagnostic tests and receive troubleshooting guidance
Download Cycles
Download new wash cycles and settings for specific fabric types
Energy Monitoring
Track energy and water usage to optimize efficiency
Maintenance Alerts
Receive reminders for filter cleaning and maintenance tasks
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| ThinQ connection issues | Wi-Fi signal weak, incorrect setup | Check Wi-Fi signal strength, re-run ThinQ setup process |
| App not connecting | Network issues, outdated app | Restart router, update ThinQ app to latest version |
| Washing machine won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| 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 |
| Unusual noises | Foreign objects in drum, unbalanced load | Check for foreign objects, redistribute load evenly |
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 connection error - Check Wi-Fi connection
Manual Downloads
Current ThinQ Model Manuals
WM3900HWA
4.5 cu.ft. Smart ThinQ Washer
WM4000HBA
4.5 cu.ft. ThinQ Steam Washer
WM4200HWA
4.8 cu.ft. ThinQ Washer
WM9000HVA
5.2 cu.ft. Premium ThinQ
Popular ThinQ Models
WM3700HWA
4.5 cu.ft. ThinQ Washer
WM3488HW
4.2 cu.ft. ThinQ Washer
WM3900HWA
4.5 cu.ft. Smart ThinQ
WM4000HBA
4.5 cu.ft. ThinQ Steam