Installation Guide
Tools Needed:
- Adjustable wrench
- Level
- Screwdrivers (flat and Phillips)
- Pliers
- Tape measure
- Vent clamps
Step-by-Step Installation
- Choose Installation Location: Select a location near necessary plumbing, electrical connections, and venting 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 to an approved exterior venting system using rigid or flexible metal ducting.
- Electrical Connection: Connect to a properly grounded 240V, 60Hz outlet for dryer function and 120V for washer function.
- 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 adequate venting.
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 | 240V/120V, 60Hz, 30A |
| Dimensions (HxWxD) | 89 x 69 x 74 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: 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
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
Wi-Fi enabled for remote control via smartphone app, allowing you to monitor cycle status, download additional programs, and receive completion alerts.
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.
Sensor Dry System
Automatically senses moisture levels and adjusts drying time accordingly, preventing over-drying and saving energy.
Steam Technology
Steam technology helps to remove tough stains, reduce allergens, and minimize wrinkles in both wash and dry cycles.
TurboWash™ & TurboDry™
Advanced technologies that save time without compromising performance, completing full loads quickly using optimized cycles.
Smart Functions
Remote Start
Start cycles remotely using the ThinQ app from anywhere
Cycle Monitoring
Monitor cycle progress and receive completion notifications
Diagnostic Alerts
Receive maintenance alerts and troubleshooting guidance
Software Updates
Automatic software updates for improved performance
Energy Monitoring
Track energy and water usage through the app
Voice Control
Compatible with Google Assistant and Amazon Alexa
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 venting, 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 dry cycle | Foreign objects in drum, unbalanced load | Check for foreign objects, redistribute load evenly |
| Error connecting to ThinQ app | Wi-Fi issues, incorrect setup | Check Wi-Fi connection, restart setup process |
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 contact service if needed
Manual Downloads
Current Model Manuals
WM3997HWA
4.5 cu.ft. ThinQ Washer Dryer
WM4000HWA
4.5 cu.ft. Steam Combo
WM3900HWA
4.3 cu.ft. ThinQ Combo
WM3488HW
4.2 cu.ft. Compact Combo
Popular Previous Models
WM3998HBA
4.5 cu.ft. Black Combo
WM3670HWA
4.2 cu.ft. Washer Dryer
WM3455HW
4.0 cu.ft. Compact Combo
WM3170CW
2.3 cu.ft. Compact Combo