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 | 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
ThinQ Technology
Smart connectivity allows you to control and monitor your washer remotely using the LG ThinQ app on your smartphone or voice commands with Google Assistant or 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°
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.
Smart Diagnosis
Quickly identify issues with your washer using the Smart Diagnosis feature through the ThinQ app, helping to troubleshoot problems without a service visit.
ColdWash™
Advanced technology that provides effective cleaning in cold water, saving energy while still removing tough stains.
Smart Features
Remote Start
Start your wash cycle from anywhere using the ThinQ app
Cycle Monitoring
Monitor cycle progress and receive notifications when done
Voice Control
Control your washer using voice commands with compatible devices
Download Cycles
Access additional wash cycles and features through the app
Usage Reports
Track your energy and water usage over time
Smart Pairing
Sync with compatible LG dryers for optimized laundry workflow
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Washer won't connect to Wi-Fi | Network issues, incorrect password, signal strength | Check network connection, verify password, move router closer |
| App not responding | App update needed, phone compatibility | Update ThinQ app, check device compatibility |
| 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 |
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 network settings
Manual Downloads
Current Model Manuals
WM3900HWA
4.5 cu.ft. Smart ThinQ Washer
WM4000HBA
4.5 cu.ft. ThinQ Steam Washer
WM3400CW
4.2 cu.ft. ThinQ Washer
WM3900HWA
4.5 cu.ft. Graphite Steel
Popular Previous Models
WM3670HVA
4.5 cu.ft. ThinQ Washer
WM3700HWA
4.5 cu.ft. Smart Washer
WM3900HCA
4.5 cu.ft. Black Stainless
WM3488HW
4.2 cu.ft. ThinQ Washer