Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Stud finder
Step-by-Step Installation
- Choose Installation Location: Select a location near necessary plumbing, electrical, and venting connections on a solid, level floor.
- Remove Shipping Materials: Remove all shipping bolts and packaging materials from both washer and dryer units.
- Stack Unit Assembly: Carefully stack dryer unit on top of washer using provided stacking kit and follow assembly instructions precisely.
- Connect Water Supply: Connect hot and cold water supply lines to the washer 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.
- Vent Installation: Install proper venting for dryer unit according to local building codes and manufacturer specifications.
- Electrical Connection: Connect to properly grounded 240V outlet for dryer and 120V outlet for washer. Do not use extension cords.
- Level the Tower: Adjust the leveling legs to ensure the entire unit is level from front to back and side to side.
- Test Run: Run both washer and dryer through complete cycles to check for leaks and proper operation.
Specifications
| Model Series | WM3900HWA + DLEX3900W |
| Type | Stacked Washer & Dryer Tower |
| Color | White / Graphite Steel |
| Washer Capacity | 4.5 cu. ft. |
| Dryer Capacity | 7.4 cu. ft. |
| Noise Level (Washer) | 54 dB |
| Control Type | Touch Controls with LCD Display |
| Energy Rating | ENERGY STAR® Certified |
| Washer Water Consumption | 13 gallons per cycle |
| Power Requirements | 240V (Dryer), 120V (Washer) |
| Dimensions (HxWxD) | 145 x 27 x 31 inches |
| Total Weight | 215 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
ThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download additional programs, receive completion alerts, and troubleshoot issues remotely.
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 with 10-year warranty.
TurboSteam™ Technology
Steam technology in both washer and dryer helps to remove tough stains, reduce allergens, minimize wrinkles, and refresh clothes without washing.
Sensor Dry System
Advanced moisture sensors detect when clothes are dry and automatically shut off, preventing over-drying and saving energy while protecting fabrics.
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.
Compact Stack Design
Space-saving vertical design perfect for apartments, condos, and small laundry rooms while providing full-size capacity and performance.
Washer Programs
Normal
Standard wash for everyday cotton and mixed fabrics
Heavy Duty
Intensive cleaning for heavily soiled work clothes and jeans
Delicates
Gentle cycle for silk, lace, and delicate fabrics
Quick Wash
Fast 30-minute cycle for lightly soiled items
Steam Refresh
Steam cycle to remove wrinkles and odors without washing
Allergiene
Special cycle to remove common allergens from fabrics
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit won't start | Power issue, door not closed properly, child lock engaged | Check power supply, ensure door is latched completely, check child lock settings |
| Poor cleaning results | Overloading, wrong detergent, incorrect program selection | Reduce load size, use HE detergent, select appropriate wash program |
| Clothes not drying properly | Lint filter clogged, venting issues, overloading | Clean lint filter, check venting system, reduce load size |
| Leaking water | Door not sealed, overfilling, loose connections | Check door seal, ensure proper detergent amount, check water connections |
| Unusual noises | Foreign objects in drum, unbalanced load, installation issues | Check for foreign objects, redistribute load evenly, verify proper installation |
| Wi-Fi connection issues | Network problems, incorrect setup, signal strength | Check network connection, re-run ThinQ setup, improve signal strength |
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
- tE: Temperature sensor error - Contact service center
- UE: Unbalanced load - Redistribute clothes and restart
Manual Downloads
Current Model Manuals
WM3900HWA + DLEX3900W
ThinQ Washer Dryer Tower
WM4000HBA + DLEX4000B
ThinQ Black Steel Tower
WM3500HWA + DLEX3500W
Compact ThinQ Tower
WM4200HWA + DLEX4200W
Large Capacity Tower
Popular Previous Models
WM3470HVA + DLE3470W
Previous Generation Tower
WM3080HWA + DLE3080W
Standard Capacity Tower
WM2240CW + DLE2240W
Compact Stackable Set
WM1355HW + DLE1355W
Basic Stackable Set