Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Stacking kit (included)
Step-by-Step Installation
- Choose Installation Location: Select a location with adequate space for both units and proper ventilation for the dryer.
- Prepare Floor Surface: Ensure the floor is solid, level, and can support the combined weight of both appliances.
- Install Washer First: Position the washing machine and remove all shipping materials and bolts.
- Connect Water Supply: Connect hot and cold water supply lines to the washer's water inlet valves using new hoses.
- Install Stacking Kit: Attach the stacking bracket to the top of the washing machine according to kit instructions.
- Position Dryer: Carefully lift and position the dryer onto the stacking bracket, ensuring secure attachment.
- Connect Ventilation: Install the dryer vent hose, ensuring proper exhaust ventilation to the outside.
- Electrical Connection: Connect both units to properly grounded outlets. Dryer requires 240V outlet.
- Test Run: Run both units through complete cycles to check for proper operation and any issues.
Specifications
| Model Series | WM3900HWA / DLE3900W |
| Type | Stackable Front Load Washer and Electric Dryer |
| Color | White / Graphite Steel |
| Washer Capacity | 4.5 cu. ft. |
| Dryer Capacity | 7.4 cu. ft. |
| Noise Level (Washer) | 54 dB / 72 dB |
| Control Type | Touch Controls with LED Display |
| Energy Rating | ENERGY STAR® Certified |
| Washer Water Consumption | 13.5 gallons per cycle |
| Power Requirements | 120V Washer / 240V Dryer |
| Stacked Dimensions (HxWxD) | 125 x 27 x 31 inches |
| Total Weight | 210 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
Space-Saving Design
Stackable configuration saves valuable floor space, perfect for apartments, condos, and small laundry rooms while providing full-size capacity.
Direct Drive Motor
LG's innovative Direct Drive motor connects directly to the drum without belts, reducing noise and vibration while increasing reliability and efficiency.
TurboSteam™ Technology
Dryer features steam technology that helps reduce wrinkles and refresh clothes, eliminating the need for ironing in many cases.
6 Motion DD Technology
Washer offers six different wash motions that can be combined to provide optimal cleaning for any fabric type, from delicate to heavily soiled items.
SmartThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download programs, and receive completion alerts for both units.
Sensor Dry System
Dryer automatically senses moisture levels and adjusts drying time accordingly, preventing over-drying and saving energy.
Washer Programs
Normal
Standard wash for everyday cotton and mixed fabrics
Heavy Duty
Intensive cleaning for heavily soiled items and sturdy fabrics
Delicates
Gentle cycle for delicate fabrics, lingerie, and hand-wash items
Quick Wash
Fast 30-minute cycle for lightly soiled items
Bedding
Special cycle for blankets, comforters, and large bedding items
Sanitary
High-temperature cycle to eliminate bacteria and allergens
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Units won't start | Power issue, door not closed properly | Check power supply, ensure both doors are latched completely |
| Excessive vibration | Unbalanced stack, uneven floor | Check stacking installation, ensure units are level and secure |
| Poor drying results | Clogged lint filter, restricted vent | Clean lint filter, check vent hose for obstructions |
| Water not draining | Drain hose clogged or kinked | Check drain hose for obstructions or kinks, clean filter |
| Washer leaks | Door not sealed, overfilling, loose connections | Check door seal, ensure proper detergent amount, check connections |
| Dryer not heating | Thermal fuse, heating element, gas supply | Check thermal fuse, heating element, or gas 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
- tE: Thermistor issue - Check temperature sensors
- HE: Heating element failure - Contact service center
Manual Downloads
Current Stackable Models
WM3900HWA / DLE3900W
Stackable Washer & Electric Dryer
WM4000HBA / DLG4001W
Stackable Washer & Gas Dryer
WM3400CW / DLE3400W
Compact Stackable Set
WM3900HCA / DLE3901W
Graphite Steel Stackable
Popular Previous Models
WM3070CW / DLG1102W
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Stackable White Set
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Large Capacity Stackable