Installation Guide
Tools Needed:
- Stacking kit (included)
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
Step-by-Step Stacking Installation
- Prepare Location: Select a location with proper ventilation, near plumbing and electrical connections on a solid, level floor.
- Install Washer: Position washer first, remove all shipping bolts and packaging materials.
- Connect Water Supply: Connect hot and cold water supply lines to washer inlet valves. Use only new hoses.
- Install Stacking Kit: Attach stacking bracket to top of washer according to kit instructions.
- Position Dryer: Carefully place dryer on top of stacking bracket, ensuring secure fit.
- Vent Connection: Connect dryer vent hose to exterior vent, ensuring proper airflow.
- Electrical Connection: Connect both units to properly grounded outlets. Do not use extension cords.
- Level the Units: Adjust leveling legs to ensure both washer and dryer are level and stable.
- Test Run: Run both units through complete cycles to check for proper operation.
Specifications
| Washer Model Series | WM3900HWA |
| Dryer Model Series | DLEX3900W |
| Type | Stackable Front Load Washer and Electric Dryer |
| Color | White |
| 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® Most Efficient |
| Washer Power Requirements | 120V, 60Hz, 15A |
| Dryer Power Requirements | 240V, 60Hz, 30A |
| Stacked Dimensions (HxWxD) | 78 x 27 x 32 inches |
| Total Weight | 205 lbs |
Warranty Information
- Full Warranty: 1 year parts and labor
- Washer Motor Warranty: 10 years on Direct Drive Motor
- Dryer Motor Warranty: 5 years on dryer motor
- Stacking Kit: 1 year warranty
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 or pulleys, reducing noise and vibration while increasing reliability.
Steam Technology
Both washer and dryer feature steam technology to remove tough stains, reduce allergens, and refresh clothes without washing.
SmartThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download programs, and receive alerts.
Sensor Dry System
Dryer automatically senses moisture levels and adjusts drying time to prevent over-drying and save energy.
TurboWash™ & TurboSteam™
Washer cleans full loads in under 30 minutes while dryer refreshes clothes and reduces wrinkles in just 20 minutes.
Stacking Benefits
Space Efficiency
Perfect for small spaces, laundry closets, and apartments with limited square footage
Convenient Height
Reduces bending and reaching with dryer at comfortable loading height
Easy Transfer
Simple transfer of laundry from washer to dryer directly above
Modern Appearance
Sleek, unified look that complements modern home decor
Installation Flexibility
Can be installed in various configurations including closet installations
Energy Efficient
Combined ENERGY STAR® rating for maximum energy savings
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 load, stacking kit not installed properly | Redistribute load, check stacking bracket installation |
| Water not draining | Drain hose clogged or kinked | Check drain hose for obstructions or kinks, clean filter |
| Dryer not heating | Power issue, vent blockage, thermal fuse | Check power connection, clean vent system, check thermal fuse |
| Stacked units shifting | Stacking kit not secure, uneven floor | Reinstall stacking bracket, level both units properly |
| Long drying times | Vent restriction, overloading, high humidity | Clean vent system, reduce load size, check humidity levels |
Error Codes
- IE: Water supply issue - Check water supply and inlet valve
- OE: Drain issue - Check drain hose and pump
- dE: Door not closed properly - Ensure door is fully closed
- tE: Motor issue - Contact service center
- FE: Flooding detected - Check for leaks and water supply
- UE: Unbalanced load - Redistribute clothes and restart
Manual Downloads
Current Stackable Models
WM3900HWA/DLEX3900W
Stackable Washer & Electric Dryer
WM4000HWA/DLEX4000W
Large Capacity Stackable Set
WM3500CW/DLE3500W
Compact Stackable Set
WM3700HWA/DLEX3700W
Smart ThinQ Stackable Set
Popular Previous Stackable Models
WM3070CW/DLE2513W
Previous Generation Stackable
WM2480HW/DLEX2480W
Steam Care Stackable Set
WM2270HW/DLEX2270W
Front Load Stackable Set
WM2140CW/DLEX2140W
Compact Stackable System