LG Direct Drive Washer Dryer WM3431HS Manual

The LG Direct Drive Washer Dryer WM3431HS is a high-efficiency front-loading combo unit with direct drive motor technology, multiple wash programs, steam functions, energy-saving features, and smart diagnostics. Below are key sections for safety, features, installation, setup, operation, 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. Maintenance Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Direct Drive Motor, Control Panel, LED Display, Detergent Dispenser, Door Lock, Water Inlet Valves, Drain Pump.

Feature	Description
Direct Drive Motor	10-year warranty, quiet operation, reduced vibration
Steam Function	Sanitizes and reduces wrinkles
TurboWash Technology	Faster washing with same cleaning performance
6Motion Technology	Multiple wash motions for different fabrics
Smart Diagnosis	Remote troubleshooting capability
Energy Star Certified	Energy and water efficient
Capacity	4.5 cu.ft. washer, 7.4 cu.ft. dryer
Display	LED with cycle indicators
Child Lock	Safety feature for families
Delay Start	Program start up to 19 hours later

Installation

Unpack and inspect contents. Place on level surface.

Remove shipping materials: Remove transit bolts and packaging.
Level the unit: Adjust leveling feet until unit is stable.
Connect water supply: Attach hot and cold water hoses to corresponding valves.
Connect drain hose: Secure to standpipe or laundry tub.
Connect electrical: Plug into dedicated 120V outlet.

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

First-Time Setup

Power on unit; follow initial setup procedure.

Run initial cleaning cycle: Use Tub Clean cycle without laundry.
Set preferences: Configure default settings in control panel.
Test functions: Run short cycle to verify operation.
Load detergent: Fill dispensers with recommended products.

CAUTION! Ensure unit is level and all shipping materials removed.

Specifications

Capacity: 4.5 cu.ft. washer, 7.4 cu.ft. dryer
Motor: Direct Drive with 10-year warranty
Energy Rating: Energy Star Certified
Water Usage: 13-15 gallons per cycle
Spin Speed: Up to 1300 RPM
Programs: 14 wash programs, 5 dryer programs
Dimensions: 27" W x 38" D x 74" H
Power Source: 120V AC, 60Hz
Weight: 205 lbs

Controls and Settings

Access functions via control panel. Main Controls: POWER, PROGRAM SELECTION, START/PAUSE, OPTIONS.

Display: Cycle time remaining, selected options, error codes.

Wash Programs: NORMAL, HEAVY DUTY, DELICATES, QUICK WASH, BEDDING, SANITARY, STEAM. Dryer Programs: NORMAL, HEAVY DUTY, DELICATES, QUICK DRY, AIR FLUFF. Options: TEMPERATURE, SPIN SPEED, SOIL LEVEL, STEAM, DELAY START, CHILD LOCK.

Connecting Utilities

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

Turn off water supply before connecting hoses.
Use only recommended hoses and fittings.
Ensure drain hose is properly secured.
Verify electrical outlet is grounded.

Tip: Check for leaks after initial connections.

Operating Modes

Supports multiple wash and dry cycles for different fabric types.

Load laundry: Distribute evenly in drum.
Select program: Choose appropriate wash/dry cycle.
Add detergent: Use recommended HE detergent.
Start cycle: Press START/PAUSE.
Monitor progress: Display shows time remaining.
Unload promptly: Remove laundry when cycle completes.
Clean dispensers: Regular maintenance after use.

WARNING! Do not overload unit. Follow load capacity guidelines.

Maintenance Features

Tub Clean Cycle: Automatic cleaning reminder. Smart Diagnosis: Remote troubleshooting via phone. Filter Cleaning: Accessible lint and drain filters.

Care & Cleaning

Unplug before cleaning. Wipe exterior with damp cloth. Clean dispensers monthly. Run Tub Clean cycle regularly.

CAUTION! Do not use abrasive cleaners. Keep control panel dry.

Regulatory Information

UL Listed; complies with US safety standards. Energy Star Certified for energy efficiency. Copyright © 2025 LG Electronics; all rights reserved. For support, visit www.lg.com or contact 1-800-243-0000.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit won't start	Power/door	Check power connection; ensure door closed properly.
No water filling	Water supply	Check water valves; verify hoses not kinked.
Excessive vibration	Leveling/load	Re-level unit; redistribute load evenly.
Error codes displayed	Various issues	Consult error code chart; use Smart Diagnosis.
Poor drying performance	Lint filter/vent	Clean lint filter; check vent system.

Reset: Unplug for 1 minute then restart.

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