Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Vent duct clamps
Step-by-Step Installation
- Choose Installation Location: Select a location near necessary plumbing, electrical connections, and venting on a solid, level floor.
- Remove Shipping Materials: Remove all shipping bolts and packaging materials from the washer dryer 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.
- Install Venting: Connect the dryer vent duct to the exhaust outlet and route to outside, ensuring minimal bends.
- Electrical Connection: Connect to a properly grounded 240V, 60Hz outlet for dryer function and 120V for washer.
- Level the Unit: Adjust the leveling legs to ensure the washer dryer is level from front to back and side to side.
- Test Run: Run both washer and dryer functions through complete cycles to check for leaks and proper operation.
Specifications
| Model Series | WM3900HWA |
| Type | Front Load Washer Dryer Combo |
| Color | Graphite Steel / White |
| Washer Capacity | 4.5 cu. ft. |
| Dryer Capacity | 7.4 cu. ft. |
| Noise Level (Wash/Spin) | 52 dB / 68 dB |
| Control Type | Touch Controls with LCD Display |
| Energy Rating | ENERGY STAR® Certified |
| Water Consumption | 8,200 L/year |
| Power Requirements | 240V/120V, 60Hz, 30A |
| Dimensions (HxWxD) | 74 x 27 x 30 inches |
| Weight | 185 lbs |
| Max Spin Speed | 1300 RPM |
Warranty Information
- Full Warranty: 2 years parts and labor
- Motor Warranty: 10 years on Direct Drive Motor
- Dryer Drum Warranty: 5 years
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
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 for both washing and drying functions.
ThinQ Technology
Smart connectivity allows remote control and monitoring via smartphone app, receive notifications, download new cycles, and diagnose issues remotely.
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.
Sensor Dry System
Advanced moisture sensors detect when clothes are dry and automatically shut off, preventing over-drying and saving energy.
Allergiene™ Cycle
Steam technology helps to remove over 95% of common household allergens from fabrics, perfect for families with allergy concerns.
TurboWash™ & TurboSteam™
Save time with TurboWash cleaning a full load in 30 minutes and TurboSteam refreshing clothes in 20 minutes without full washing.
Washer Dryer Programs
Normal Wash
Standard cleaning for everyday cotton and mixed fabrics
Heavy Duty
Intensive cleaning for heavily soiled work clothes and linens
Delicates
Gentle cycle for silk, lace, and delicate synthetic fabrics
Quick Wash & Dry
Complete wash and dry cycle in under 60 minutes
Sanitary Cycle
High-temperature wash to eliminate bacteria and germs
Steam Refresh
Remove wrinkles and odors without washing
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, disable child lock |
| Clothes not drying properly | Overloading, lint filter clogged, vent blocked | Reduce load size, clean lint filter, check venting |
| Water not draining | Drain hose clogged or kinked, pump filter blocked | Check drain hose for obstructions, clean pump filter |
| Leaking water | Door not sealed, overfilling, loose connections | Check door seal, ensure proper detergent amount, check connections |
| Unusual noises during drying | Foreign objects in drum, blower wheel obstruction | Check for foreign objects, inspect blower wheel |
| Error codes displayed | Various system faults detected | Refer to error code list 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 venting and thermal fuse
Manual Downloads
Current Model Manuals
WM3900HWA
4.5 cu.ft. ThinQ Washer Dryer
WM4000HBA
4.8 cu.ft. Steam Combo
WM3500CLA
4.5 cu.ft. Compact Combo
WM3900HCA
4.5 cu.ft. Graphite Combo
Popular Previous Models
WM3488HW
2.3 cu.ft. Compact Combo
WM3997HWA
4.3 cu.ft. Steam Combo
WM3170CW
4.5 cu.ft. Basic Combo
WM3455HW
4.3 cu.ft. Ventless Combo