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 LED 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
AI Direct Drive Motor
LG's AI-powered Direct Drive motor uses artificial intelligence to automatically detect fabric types and adjust washing motions for optimal cleaning performance.
ThinQ Technology
Smart connectivity allows remote control via smartphone app, cycle monitoring, and voice control compatibility with Google Assistant and Amazon Alexa.
TurboWash™ 360°
Advanced cleaning technology uses multi-directional powerful jets to thoroughly clean clothes in less time while using less water and energy.
Steam Technology
Allergy Care cycle uses steam to remove over 95% of common household allergens, while Steam Refresh removes wrinkles and odors from lightly worn clothes.
Smart Diagnosis
Built-in diagnostic system can detect issues and provide troubleshooting guidance through the ThinQ app or by sound analysis over the phone.
ColdWash™ Technology
Advanced cold water washing technology provides effective cleaning in cold water, saving energy while maintaining cleaning performance.
Smart ThinQ Features
Remote Start
Start or schedule wash cycles remotely from your smartphone
Cycle Monitoring
Monitor cycle progress and receive completion alerts on your phone
Voice Control
Compatible with Google Assistant and Amazon Alexa for voice commands
Software Updates
Receive over-the-air updates with new features and cycle options
Usage Reports
Track energy and water usage through the ThinQ app
Smart Pairing
Automatically pair with compatible LG dryers for optimized laundry cycles
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Washing machine won't start | Power issue, door not closed properly, Wi-Fi connection | Check power supply, ensure door is latched, verify ThinQ connection |
| Poor cleaning results | Overloading, wrong detergent, incorrect AI settings | Reduce load size, use HE detergent, check AI fabric detection |
| Water not draining | Drain hose clogged or kinked, pump filter blocked | Check drain hose for obstructions, clean pump 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, motor issue | Check for foreign objects, redistribute load evenly, run diagnostics |
| ThinQ connection issues | Wi-Fi signal, app configuration, network settings | Check Wi-Fi signal, reinstall ThinQ app, reset network connection |
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 and app settings
Manual Downloads
Current Model Manuals
WM3900HWA
4.5 cu.ft. Smart ThinQ Washer
WM4000HWA
4.5 cu.ft. AI DD Washer
WM4200HWA
4.8 cu.ft. ThinQ Washer
WM3900HBA
4.5 cu.ft. Black Stainless
Popular Previous Models
WM3700HWA
4.5 cu.ft. ThinQ Washer
WM3470HVA
4.5 cu.ft. Smart Washer
WM3170CW
4.5 cu.ft. White Washer
WM3488HW
4.3 cu.ft. ThinQ Washer