Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Drain hose adapter
Step-by-Step Installation
- Choose Installation Location: Select a location near necessary plumbing and electrical connections on a solid, level floor with proper ventilation.
- Remove Shipping Materials: Remove all shipping bolts and packaging materials from the washer dryer 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: Install proper exhaust venting for drying function according to local building codes.
- Electrical Connection: Connect to a properly grounded 240V, 60Hz, dedicated outlet. Do not use an extension cord.
- 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 washing and drying cycles to check for leaks and proper operation.
Specifications
| Model Series | WM3998HWA |
| Type | Front Load Washer Dryer Combo |
| Color | Graphite Steel / White |
| Wash Capacity | 4.5 cu. ft. |
| Dry Capacity | 7.4 cu. ft. |
| Noise Level (Wash/Spin) | 51 dB / 68 dB |
| Control Type | Touch Controls with LED Display |
| Energy Rating | ENERGY STAR® Certified |
| Water Consumption | 8,200 L/year |
| Power Requirements | 240V, 60Hz, 30A |
| Dimensions (HxWxD) | 89 x 69 x 74 cm |
| Weight | 108 kg |
| Max Spin Speed | 1300 RPM |
Warranty Information
- Full Warranty: 2 years parts and labor
- Motor Warranty: 10 years on Direct Drive Motor
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
TrueSteam Technology
Advanced steam technology removes tough stains, reduces allergens, and refreshes clothes without washing, saving time and energy.
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.
Inverter Heat Pump Drying
Energy-efficient heat pump drying technology uses less energy while providing gentle, effective drying for all fabric types.
All-in-One Design
Combines washing and drying functions in a single unit, perfect for spaces where separate machines aren't practical.
SmartThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download programs, and receive alerts.
TurboWash™ 360°
Advanced washing technology that uses powerful jet sprays and optimized drum rotations to clean thoroughly in less time.
Wash Programs
Normal Wash
Standard washing program for everyday laundry with balanced cleaning and energy use
Heavy Duty
Intensive cleaning for heavily soiled items with extended wash time and higher temperature
Delicates
Gentle cycle for delicate fabrics with reduced tumbling and lower spin speeds
Quick Wash
Fast cleaning cycle for lightly soiled items, completed in 30 minutes or less
Steam Refresh
Uses steam to remove wrinkles and odors from clothes without full washing cycle
Allergiene Cycle
Special cycle that uses steam 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, disable child lock |
| Poor drying results | Overloading, lint filter clogged, incorrect program | Reduce load size, clean lint filter, select appropriate drying program |
| 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, unbalanced load, ventilation issues | Check for foreign objects, redistribute load, check venting |
| Steam function not working | Water supply issue, steam generator problem | Check water supply, contact service if steam generator faulty |
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
- HE: Heating element issue - Contact service center
Manual Downloads
Current Model Manuals
WM3998HWA
TrueSteam Washer Dryer Combo
WM4000HWA
TrueSteam Large Capacity
WM3900HWA
TrueSteam ThinQ Combo
WM3988HWA
TrueSteam Graphite Combo
Popular Previous Models
WM3488HW
4.2 cu. ft. Washer Dryer
WM3170CW
Stackable Washer Dryer
WM3997HBA
Black Stainless Combo
WM3455HW
Compact Washer Dryer