Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Ventilation duct clamps
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, brackets and packaging materials from the washer dryer combo.
- 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 Ventilation: Connect the dryer vent to an exterior wall using proper ducting materials.
- Electrical Connection: Connect to a properly grounded 240V, 60Hz, AC only outlet. Do not use an extension cord.
- Level the Machine: 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 and proper operation.
Specifications
| Model Series | WM3998H*A |
| Type | Front Load Washer Dryer Combo |
| Color | Graphite Steel / White |
| Wash Capacity | 4.5 cu. ft. |
| Dry Capacity | 4.5 cu. ft. |
| Noise Level (Wash/Spin/Dry) | 52 dB / 68 dB / 65 dB |
| Control Type | Touch Controls with LCD 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 | 108 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: 10 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
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 via smartphone app, cycle monitoring, energy usage tracking, and receiving maintenance alerts and cycle completion notifications.
All-in-One Design
Combines washing and drying functions in a single unit, saving space and eliminating the need to transfer laundry between machines.
Sensor Dry System
Advanced moisture sensors automatically detect when clothes are dry and adjust drying time accordingly, preventing over-drying and saving energy.
Steam Technology
Steam refresh cycle removes wrinkles and odors from clothes, while steam washing helps to remove tough stains and allergens.
TurboWash™ & TurboDry™
Accelerated wash and dry cycles that clean and dry a full load in under 2 hours without compromising performance.
Smart Features
Remote Start
Start wash or dry cycles remotely using the ThinQ app
Cycle Monitoring
Monitor cycle progress and receive completion alerts
Diagnostics
Smart diagnostics can identify issues and suggest solutions
Energy Monitoring
Track energy and water usage through the app
Voice Control
Compatible with Google Assistant and Amazon Alexa
Software Updates
Receive over-the-air updates for new features and improvements
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| Poor drying results | Overloading, clogged lint filter, ventilation issues | Reduce load size, clean lint filter, check ventilation |
| 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 |
| Error codes displayed | Various system issues detected | Refer to error code section below, contact service if needed |
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 ventilation and heating element
Manual Downloads
Current Model Manuals
WM3998H*A
4.5 cu.ft. ThinQ Washer Dryer
WM4000H*A
4.8 cu.ft. ThinQ Combo
WM3900H*W
4.5 cu.ft. White Combo
WM4200H*B
4.8 cu.ft. Black Combo
Popular Previous Models
WM3488HW
4.2 cu.ft. Washer Dryer
WM3997HWA
4.5 cu.ft. Steam Combo
WM3170CW
4.3 cu.ft. Compact Combo
WM3455HW
4.2 cu.ft. Basic Combo