Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Duct tape for venting
Step-by-Step Installation
- Choose Installation Location: Select a location with proper ventilation, near plumbing and electrical connections on a solid, level floor.
- 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.
- Install Venting: Connect the dryer vent hose to the exhaust port and route to outdoor ventilation.
- 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 combo is level from front to back and side to side.
- Test Run: Run both wash and dry 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 | 3.5 cu. ft. |
| Noise Level (Wash/Spin/Dry) | 55 dB / 72 dB / 65 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 75 cm |
| Weight | 95 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
All-in-One Design
Combines washing and drying functions in a single unit, saving space and providing complete laundry solution in one machine.
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.
Inverter Heat Pump Technology
Energy-efficient heat pump drying technology uses less energy while providing gentle, effective drying for all fabric types.
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.
Steam Technology
Steam technology helps to remove tough stains, reduce allergens, and minimize wrinkles, leaving clothes fresh and hygienically clean.
SmartThinQ Technology
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download additional programs, and receive completion alerts.
Drying Programs
Sensor Dry
Automatically detects moisture levels and adjusts drying time for perfect results
Time Dry
Manual drying with customizable time settings for specific needs
Wrinkle Care
Gentle tumbling with steam to reduce wrinkles after drying cycle
Quick Dry
Rapid drying cycle for small loads or lightly damp items
Eco Dry
Energy-saving drying mode for reduced power consumption
Delicates Dry
Low-temperature drying for delicate fabrics and special care items
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| Poor cleaning results | Overloading, wrong detergent, incorrect program | Reduce load size, use correct detergent, select appropriate program |
| Clothes not drying properly | Overloading, lint filter clogged, venting issues | Reduce load size, clean lint filter, check venting system |
| Water not draining | Drain hose clogged or kinked | Check drain hose for obstructions or kinks, clean filter |
| Leaking water | Door not sealed, overfilling, loose connections | Check door seal, ensure proper detergent amount, check connections |
| Unusual noises | Foreign objects in drum, unbalanced load | Check for foreign objects, redistribute load evenly |
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: Heating element error - Check dryer function
Manual Downloads
Current Model Manuals
WM3998HWA
4.5 cu.ft. Washer Dryer Combo
WM3900HWA
4.5 cu.ft. Steam Combo
WM4000HWA
4.8 cu.ft. ThinQ Combo
WM3488HW
4.2 cu.ft. Compact Combo
Popular Previous Models
WM3997HBA
4.5 cu.ft. Black Combo
WM3170CW
4.5 cu.ft. White Combo
WM3488HS
4.2 cu.ft. Stainless Combo
WM3455HW
4.0 cu.ft. Compact Combo