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 plumbing, electrical, and venting connections 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 port and route to outside, ensuring minimal bends.
- 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 wash and dry cycles to check for leaks, proper operation, and venting.
Specifications
| Model Series | WM3998HWA |
| Type | Front Load Washer Dryer Combo |
| Color | Stainless Steel / Graphite Steel |
| 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
- Drum Warranty: 5 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
All-in-One Design
Combines washing and drying functions in a single unit, saving space and eliminating the need to transfer laundry between machines.
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.
Heat Pump Drying
Energy-efficient heat pump technology recycles hot air during the drying process, using less energy while providing gentle drying for all fabric types.
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.
TurboWash™ & TurboDry™
Time-saving features that wash a full load in 59 minutes and dry efficiently using optimized drum rotations and airflow technology.
Wash & Dry Programs
Normal Wash & Dry
Standard cycle for everyday cotton and mixed fabrics with automatic drying
Heavy Duty
Intensive cleaning and drying for heavily soiled items and sturdy fabrics
Delicates
Gentle wash and low-heat drying for delicate fabrics and special care items
Quick Wash & Dry
Rapid cycle for lightly soiled items that need to be ready quickly
Sanitary
High-temperature wash and dry to eliminate bacteria and allergens
Wrinkle Care
Special steam function to reduce wrinkles and refresh clothing
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| Poor drying results | Overloading, clogged lint filter, venting issues | Reduce load size, clean lint filter, check venting |
| 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 during drying | Foreign objects in drum, unbalanced load | Check for foreign objects, redistribute load evenly |
| Excessive vibration | Unbalanced load, uneven floor, shipping bolts not removed | Redistribute load, level the machine, ensure shipping bolts removed |
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 heating element
Manual Downloads
Current Model Manuals
WM3998HWA
4.5 cu. ft. Washer Dryer Combo
WM4000HWA
5.0 cu. ft. Smart Combo
WM3900HWA
4.3 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
WM3455HW
4.2 cu. ft. Steam Combo
WM3080CW
4.0 cu. ft. Basic Combo