Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
Step-by-Step Installation
- Choose Installation Location: Select a location near necessary 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.
- Vent Connection: Connect the dryer vent to an approved exterior venting system using rigid or flexible metal ducting.
- Electrical Connection: Connect to a properly grounded 120V, 60Hz, AC only 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 and proper operation.
Specifications
| Model Series | WM3997HWA |
| Type | Front Load Washer Dryer Combo |
| Color | White / Graphite Steel |
| Wash Capacity | 4.5 cu. ft. |
| Dry Capacity | 4.5 cu. ft. |
| Noise Level (Wash/Dry) | 55 dB / 65 dB |
| Control Type | Touch Controls with LCD Display |
| Energy Rating | ENERGY STAR® Certified |
| Water Consumption | 8,200 L/year |
| Power Requirements | 120V, 60Hz, 15A |
| 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
- 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.
ThinQ Technology
Smart connectivity allows remote control and monitoring via smartphone app, with cycle customization and diagnostic capabilities.
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.
Sensor Dry System
Automatically detects moisture levels and adjusts drying time accordingly, preventing over-drying and saving energy.
Steam Technology
Steam refresh cycle removes wrinkles and odors from clothes, while steam washing helps eliminate allergens and tough stains.
TurboWash™ & TurboDry™
Advanced technologies that reduce wash and dry times without compromising performance, completing full cycles in under 2 hours.
Smart Features
Remote Start
Start wash or dry cycles remotely using the ThinQ app from anywhere
Cycle Monitoring
Monitor cycle progress and receive completion alerts on your smartphone
Diagnostic Alerts
Receive maintenance reminders and troubleshooting guidance through the app
Voice Control
Compatible with Amazon Alexa and Google Assistant for voice commands
Energy Monitoring
Track energy and water usage to optimize efficiency and reduce costs
Software Updates
Automatic software updates ensure your unit always has the latest features
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit won't start | Power issue, door not closed properly | Check power supply, ensure door is latched completely |
| Clothes not drying properly | Vent blockage, overloaded, incorrect cycle | Check vent system, reduce load size, select appropriate dry cycle |
| 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 connecting to ThinQ | Wi-Fi issues, incorrect setup | Check Wi-Fi connection, re-run setup process in ThinQ app |
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 issue - Contact service center
Manual Downloads
Current Model Manuals
WM3997HWA
4.5 cu. ft. ThinQ Washer Dryer
WM3900HWA
4.5 cu. ft. Steam Combo
WM4000HWA
4.8 cu. ft. ThinQ Combo
WM3488HW
2.3 cu. ft. Compact Combo
Popular Previous Models
WM3998HBA
4.5 cu. ft. Black Combo
WM3170CW
4.5 cu. ft. White Combo
WM3455HW
2.3 cu. ft. Compact
WM2240CW
4.5 cu. ft. Basic Combo