Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Gas line connector (if gas model)
Step-by-Step Installation
- Choose Installation Location: Select a location with proper ventilation, near necessary plumbing and electrical connections on a solid, level floor.
- Remove Shipping Materials: Remove all shipping bolts and packaging materials from the combo unit.
- 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.
- Ventilation Setup: For dryer function, ensure proper ventilation ducting is installed according to local codes.
- Electrical Connection: Connect to a properly grounded 240V, 60Hz outlet for electric models or gas line for gas models.
- Level the Unit: Adjust the leveling legs to ensure the combo unit is level from front to back and side to side.
- Test Run: Run both wash and dry cycles to check for proper operation and leaks.
Specifications
| Model Series | WM3900HWA |
| Type | Washer Dryer Combo |
| Color | Graphite Steel / White |
| Wash Capacity | 4.5 cu. ft. |
| Dry Capacity | 7.4 cu. ft. |
| Noise Level (Wash/Dry) | 55 dB / 65 dB |
| Control Type | Touch Controls with LCD Display |
| Energy Rating | ENERGY STAR® Certified |
| Water Consumption | 8,200 L/year |
| Power Requirements | 240V, 60Hz (Electric) / Natural Gas (Gas Models) |
| Dimensions (HxWxD) | 74 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
- Drum Warranty: 10 years on stainless steel drum
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
All-in-One Design
Combines washing and drying functions in a single unit, saving space and eliminating the need to transfer laundry between machines.
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.
ThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download additional programs, and receive completion alerts.
Steam Technology
Steam technology helps to remove tough stains, reduce allergens, and minimize wrinkles, leaving clothes fresh and hygienically clean.
TurboWash™
This feature saves time without compromising cleaning performance, washing a full load in just 30 minutes using powerful jet sprays.
Sensor Dry System
Automatically senses moisture levels and adjusts drying time accordingly, preventing over-drying and saving energy.
Smart Functions
Remote Start
Start wash or dry cycles remotely using the ThinQ app from anywhere
Cycle Monitoring
Monitor cycle progress and receive notifications when cycles are complete
Diagnostics
Smart diagnostics can identify issues and suggest solutions through the app
Software Updates
Receive automatic software updates with new features and improvements
Energy Monitoring
Track energy and water usage through the ThinQ application
Voice Control
Compatible with Google Assistant and Amazon Alexa for voice commands
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| Clothes not drying properly | Overloading, lint filter clogged, ventilation issue | Reduce load size, clean lint filter, check ventilation |
| 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 displayed | Various system issues detected | Refer to error code section below, contact service if persistent |
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: Temperature sensor error - Contact service center
- HE: Heater error - Check heating element and connections
Manual Downloads
Current Model Manuals
WM3900HWA
4.5 cu. ft. ThinQ Combo
WM4000HWA
4.8 cu. ft. Steam Combo
WM3900HBA
4.5 cu. ft. Black Combo
WM4000HCA
4.8 cu. ft. Graphite Combo
Popular Previous Models
WM3488HW
2.3 cu. ft. Compact Combo
WM3997HWA
4.3 cu. ft. ThinQ Combo
WM3998HWA
4.5 cu. ft. Steam Combo
WM3455HW
2.3 cu. ft. White Combo