LG Combination Washer Dryer Manual

The LG Combination Washer Dryer is an all-in-one laundry solution featuring advanced washing and drying technologies, multiple wash cycles, energy-efficient operation, smart connectivity, and compact design. This unit combines front-load washing with condenser drying in a single appliance, offering steam refresh, allergen cycles, turbo wash technology, and Wi-Fi connectivity for remote control. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Utilities 7. Operating Modes 8. Smart Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Front-load drum, control panel, detergent dispenser, water inlet valves, drain pump, condenser drying system, lint filter, and door lock mechanism.

Feature	Description
TurboWash Technology	Reduces wash time while maintaining cleaning performance
Steam Refresh	Removes wrinkles and odors from clothes
Allergen Cycle	Reduces allergens with steam and high-temperature washing
SmartThinQ Technology	Wi-Fi connectivity for remote control and monitoring
6Motion Technology	Multiple wash motions for different fabric types
Condenser Drying	No external venting required
Energy Star Certified	Energy and water efficient operation
LED Display	Clear cycle status and time remaining
Child Lock	Prevents accidental program changes
Delay Start	Schedule wash cycles for later times

Installation

Unpack and inspect contents. Place on level, solid floor.

Remove shipping materials: Remove transit bolts and packing materials from drum.
Connect water supply: Attach hot and cold water hoses to corresponding valves.
Connect drain hose: Route to standpipe or laundry sink with proper height.
Level the unit: Adjust leveling feet to prevent vibration and noise.
Plug into dedicated electrical outlet.

WARNING! Unit is heavy; use two people for moving. Ensure all connections are secure before operation.

First-Time Setup

Power on unit; run initial setup procedure.

Install SmartThinQ app: Download and connect to home Wi-Fi network.
Run cleaning cycle: Use Tub Clean cycle with affresh tablet or vinegar.
Set preferences: Configure default settings, temperature preferences, and notifications.
Test operation: Run short cycle to verify proper installation.
Register product: Complete warranty registration online or via app.

CAUTION! Ensure unit is level and all shipping materials are removed before first use.

Specifications

Capacity: 4.5 cu.ft. washer / 7.4 cu.ft. dryer
Dimensions: 27" W x 33" D x 74" H
Water Connections: Hot and cold water inlet
Electrical: 120V, 15A dedicated circuit
Wash Cycles: Normal, Heavy Duty, Delicates, Quick Wash, Steam, Allergen
Dry Cycles: Normal, Heavy Duty, Delicates, Timed Dry, Air Fluff
Spin Speeds: 400-1400 RPM adjustable
Noise Level: 52 dB washing / 65 dB drying
Energy Rating: ENERGY STAR Most Efficient 2024
Warranty: 10-year motor warranty, 1-year parts and labor

Controls and Settings

Access controls via front panel or SmartThinQ app. Control Panel: POWER, START/PAUSE, CYCLE SELECTION, OPTIONS, CHILD LOCK.

Wash Cycles: Normal, Heavy Duty, Delicates, Quick Wash (30 min), Bedding, Steam Refresh, Allergen, Tub Clean. Dry Cycles: Normal, Heavy Duty, Delicates, Timed Dry, Air Fluff, Steam Refresh.

Options: Temperature (Cold, Warm, Hot), Spin Speed (400-1400 RPM), Soil Level (Light, Normal, Heavy), Dryness Level (Less Dry, Normal, More Dry), Delay Start (1-19 hours), Pre Wash, Extra Rinse.

Connecting Utilities

Water Supply: Hot and cold water connections. Drain: Standpipe or laundry sink. Electrical: Dedicated 120V outlet.

Turn off water supply before connecting hoses.
Use only LG-approved hoses; do not overtighten.
Ensure drain hose is secured at proper height (minimum 39 inches).
Plug into grounded outlet; do not use extension cord.
Check for leaks after connections are made.

Tip: Install water hammer arrestors if water pressure exceeds 120 psi.

Operating Modes

Supports various fabric types and cleaning needs.

Select load size: Small (1-4 lbs), Medium (5-8 lbs), Large (9-12 lbs)
Choose wash cycle: Based on fabric type and soil level
Set options: Temperature, spin speed, additional rinses
Add detergent: Use HE detergent only; follow dispenser markings
Start cycle: Close door firmly; press START/PAUSE
Monitor progress: LED display shows time remaining
Transfer to dry: Automatic or manual transfer available
Clean lint filter: After every drying cycle

WARNING! Do not overload unit; balance load for proper operation. Use only HE detergent.

Smart Features

SmartThinQ App: Remote start/stop, cycle monitoring, energy usage tracking, diagnostic alerts, firmware updates. Voice Control: Compatible with Google Assistant and Amazon Alexa.

Care & Maintenance

Regular maintenance ensures optimal performance and longevity.

Clean lint filter after every drying cycle
Run Tub Clean cycle monthly with affresh tablet
Wipe door seal and glass regularly
Clean detergent dispenser monthly
Check drain pump filter quarterly
Inspect hoses annually for wear

CAUTION! Unplug unit before cleaning. Do not use abrasive cleaners on surfaces.

Regulatory Information

UL Listed; complies with FCC Part 15 for digital devices. ENERGY STAR Certified 2024. California Energy Commission compliant. Copyright © 2024 LG Electronics; all rights reserved. For support, visit www.lg.com or contact 1-800-243-0000. Model: WM3900HWA

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit won't start	Door not closed/power	Ensure door is firmly closed; check power cord connection; verify circuit breaker.
No water filling	Water supply/valves	Check water valves are open; inspect hoses for kinks; clean inlet filters.
Excessive vibration	Leveling/load balance	Re-level unit; redistribute load evenly; remove shipping materials.
Poor drying performance	Lint filter/load size	Clean lint filter; reduce load size; check room temperature and humidity.
Error codes displayed	Various system issues	Consult error code chart in manual; run diagnostic cycle; contact service.
Water leakage	Hose connections	Tighten hose connections; check door seal; inspect drain hose.
Unusual noises	Foreign objects/bearings	Check for objects in drum; if persistent, contact authorized service.

Reset: Unplug for 1 minute or press POWER for 10 seconds.

Service: 1-800-243-0000; www.lg.com