Important Safety Instructions

Ensure the washer is installed on a level, firm floor to minimize vibration. Avoid using flammable liquids nearby and keep the appliance away from water exposure. Always unplug during extended periods and never use unauthorized components. Follow all safety messages in the manual to prevent accidents and ensure optimal performance.

• Do not store flammable vapors or liquids near the appliance.
• Ensure the floor is level and firm to prevent vibration.
• Avoid using unauthorized parts to maintain safety and efficiency.

1.1 Safety Messages and Warnings

Read all safety messages carefully to ensure safe operation. The appliance must not be used if submerged in water or exposed to flammable vapors. Mixing chlorine bleach with ammonia is dangerous. Always follow package directions for laundry products. Keep the washer on a level floor and avoid placing objects on it. Turn off water faucets when the washer is not in use for extended periods. Use only authorized parts to maintain safety and performance.

• Do not operate the washer if it has been submerged in water.
• Avoid mixing chlorine bleach with ammonia or acids.
• Ensure the floor is level to prevent vibration and instability.

1.2 Installation and Usage Guidelines

Ensure the washer is installed on a firm, level surface to minimize vibration and noise. Use only new hoses during installation, as old ones may leak; Connect the inlet hoses to the correct faucets and ensure the drain hose is properly secured. Periodically inspect hoses for cracks or wear and replace them every five years. Avoid using adapters or extension cords to prevent fire hazards. For optimal performance, plug the washer into a dedicated outlet.

• Use new hoses to prevent leaks and potential water damage.
• Ensure the drain hose is not sealed to avoid siphoning issues.
• Check hoses regularly for signs of wear or damage.

Product Overview

The LG WM3400CW is a front-load washer designed for efficient cleaning with a 4.5 cu. ft. capacity, ideal for handling large loads. Its compact dimensions (27″ x 39″ x 30.25″) fit seamlessly into modern laundry spaces, while advanced features ensure optimal performance and energy efficiency;

• Capacity: 4.5 cubic feet for large loads.
• Dimensions: 27″ width, 39″ height, 30.25″ depth.
• Energy-efficient design for reduced utility costs.

2.1 Dimensions and Specifications

The LG WM3400CW washing machine features dimensions of 27 inches in width, 39 inches in height, and 30 1/4 inches in depth, making it suitable for standard laundry spaces. It operates at 120V AC, 60Hz, with a minimum water pressure of 20 psi and maximum of 120 psi. The washer has a large 4.5 cubic foot capacity, ideal for handling bulky items like blankets and comforters efficiently.

• Width: 27 inches (70 cm)
• Height: 39 inches (99 cm)
• Depth: 30 1/4 inches (77 cm)
• Capacity: 4.5 cu. ft.
• Voltage: 120V AC, 60Hz

2.2 Included Accessories

The LG WM3400CW washer comes with essential accessories for convenient installation and operation. These include a power cord, drain hose, inlet hoses, and a detergent drawer. Additional items like a leveling wrench ensure proper installation, while the liquid detergent cup and fabric softener compartment enhance washing efficiency. These accessories are designed to optimize performance and user experience.

• Power cord for electrical connection
• Drain hose for water disposal
• Inlet hoses for water supply
• Detergent drawer for laundry products
• Leveling wrench for stability adjustments

Installation Guide

Ensure the washer is installed on a firm, level floor with proper clearances. Connect hoses correctly, avoiding old or damaged ones, and ensure the drain setup is secure.

3.1 Pre-Installation Checklist

Before installing the LG WM3400CW washer, ensure the location is firm, level, and has proper drainage. Check for a stable power supply and water pressure between 20-120 psi. Unpack and inspect for damage, removing all shipping materials. Ensure the floor clearances meet specifications (27″ width, 30 1/4″ depth, 39″ height). Prepare necessary tools and ensure the drain hose is correctly positioned. Avoid using old hoses and ensure all connections are secure.

• Verify floor stability and levelness.
• Check water pressure and electrical requirements.
• Inspect for damage during unpacking.

3.2 Leveling the Washer

Ensure the washer is placed on a firm, level surface to minimize vibration and noise. Adjust the leveling feet by turning them clockwise or counterclockwise to achieve balance. Use a spirit level to verify even placement. Proper leveling prevents uneven operation and potential damage. After adjustment, recheck the balance to ensure stability during high-speed spins.

• Adjust leveling feet to achieve a balanced surface.
• Use a spirit level for accurate positioning.
• Ensure stability to prevent vibration during operation.

3.3 Connecting Hoses and Drain

Connect the hot and cold water hoses to the corresponding faucets, ensuring they are securely attached. Use only new hoses to prevent leaks or bursts. The drain hose should be placed in a standpipe or directed into a drain, avoiding airtight seals. Periodically inspect hoses for cracks or wear and replace every five years. Proper connections ensure safe and efficient operation, preventing water damage or performance issues.

• Use new hoses to avoid potential leaks or bursts.
• Ensure the drain hose is not sealed airtight.
• Check hose connections periodically for damage.

3.4 Final Installation Check

After installation, verify all connections are secure and correct. Ensure the washer is level, hoses are tightly connected, and the drain hose is properly placed. Check for leaks by running a short cycle. Confirm the power supply is stable and the drain system functions correctly. Ensure no shipping materials remain and all accessories are in place. A thorough final check ensures safe and efficient operation, preventing potential issues like leaks or improper drainage.

• Verify all water and drain connections are secure.
• Ensure the washer is level to prevent vibration.
• Check for leaks and proper drainage function.



Operating the Washer

Sort laundry by fabric type, color, and soil level. Load items evenly, avoiding overloading. Select the appropriate cycle and settings based on fabric care labels for optimal cleaning.

• Sort laundry to prevent damage and ensure even washing.
• Select cycles and settings according to fabric care guidelines.

4.1 Sorting Laundry and Loading

Sort laundry by fabric type, color, and soil level to ensure optimal cleaning and prevent damage. Separate delicate items from heavier fabrics and avoid overloading the washer. Check the door seal for small items after unloading. Load bulky items like blankets individually to maintain balance. Always follow fabric care labels for specific instructions. Proper sorting and loading help maintain washer efficiency and extend the life of your clothes.

• Separate delicates from heavier fabrics to prevent damage.
• Load bulky items individually for balanced operation.
• Check door seals for trapped small items after unloading.

4.2 Fabric Care Labels and Settings

Always check fabric care labels for specific washing instructions. Adjust the wash cycle, temperature, and spin speed based on the label recommendations. Use the Perm Press setting for wrinkled fabrics and the Hand Wash cycle for delicate items. For heavily soiled clothes, select the Heavy Duty cycle. Ensure proper fabric care by matching settings to the label guidelines. This helps maintain fabric quality and prevents damage. Use the Extra Rinse option for bulky items to remove detergent residue effectively.

• Match wash cycles to fabric types for optimal care.
• Use Perm Press for wrinkled or sensitive fabrics.
• Select Extra Rinse for bulky items to ensure cleanliness.



Maintenance and Care

Regularly clean the washer’s gasket and drain pump filter to prevent odor buildup. Check and replace hoses every 5 years. Ensure proper ventilation to avoid moisture issues.

• Clean the gasket and drain filter after each use.
• Inspect hoses for cracks and replace as needed.
• Ensure good ventilation to prevent mold growth.

5.1 Regular Cleaning Tips

Regular cleaning ensures optimal performance and prevents odor buildup. Wipe the exterior with a damp cloth and check the drain hose for blockages. Clean the detergent dispenser and gasket after each use. Leave the door open after cycles to dry the interior. Run a cleaning cycle monthly. Check and clean the filter regularly to maintain efficiency. Ensure the drain pump filter is free of debris. Regular maintenance helps extend the washer’s lifespan and keeps laundry fresh.

• Wipe the exterior with a damp cloth to remove dust.
• Check and clean the drain hose for proper water flow.
• Clean the detergent dispenser and gasket to prevent mold.
• Leave the door open after use to dry the interior.
• Run a cleaning cycle monthly for internal maintenance.

5.2 Periodic Maintenance Checklist

Perform periodic checks to ensure optimal washer performance. Inspect the drain hose for kinks or blockages and replace every 5 years. Check the drain pump filter monthly and clean as needed. Ensure the washer remains level to prevent vibration. Run a cleaning cycle every 1-2 months to remove detergent residue. Inspect the detergent dispenser for buildup and clean regularly. Check the gasket for mold and mildew, cleaning as necessary. Regular inspections help maintain efficiency and prevent issues.

• Inspect and replace drain hoses every 5 years.
• Clean the drain pump filter monthly.
• Ensure the washer remains level to avoid vibration.
• Run a cleaning cycle every 1-2 months.
• Check and clean the detergent dispenser.



Troubleshooting Common Issues

Refer to the error codes in the manual for solutions. Common issues include imbalanced loads, drainage problems, or faulty sensors. Check the drain hose for kinks and ensure the washer is level. For persistent issues, consult the manual or contact LG support.



• Check error codes for specific solutions.
• Ensure the washer is properly leveled.
• Inspect the drain hose for blockages.

6.1 Error Codes and Solutions

Common error codes like “OE” indicate drain issues, while “UE” signals an imbalanced load. “CE” denotes motor problems, and “PE” relates to temperature sensors. For “OE,” check the drain hose for kinks or blockages and ensure proper installation. If “UE” appears, redistribute the laundry load. “CE” requires professional servicing, while “PE” may need sensor replacement. Refer to the manual for detailed solutions and restart the washer after addressing the issue.

• OE: Drain hose issues.
• UE: Imbalanced load.
• CE: Motor malfunction.
• PE: Temperature sensor problems;



Smart Functions and Features

Experience smart laundry with LG ThinQ app integration, enabling remote control and monitoring. Smart Diagnosis detects issues, and voice control via smart speakers simplifies operations.

• LG ThinQ App: Remote monitoring.
• Smart Diagnosis: Error detection.
• Voice Control: Compatibility with smart speakers.

7.1 LG ThinQ Application Setup

Download and install the LG ThinQ app from the App Store or Google Play. Launch the app, create an account, and select the WM3400CW model. Ensure your washer is connected to Wi-Fi and follow in-app instructions to complete pairing. Once connected, you can monitor cycles, receive notifications, and control settings remotely for enhanced convenience and smart home integration.

7.2 Smart Diagnosis Function

The Smart Diagnosis function helps identify and troubleshoot issues with your washer. Using the LG ThinQ app, you can activate this feature to analyze error codes and diagnose problems remotely. Launch the app, select Smart Diagnosis, and follow the prompts to run a diagnostic check. This feature helps resolve issues quickly and efficiently, reducing the need for technician visits. Ensure your washer is connected to Wi-Fi for optimal functionality.

• Activates via the LG ThinQ app for remote diagnostics.
• Analyzes error codes and provides solutions.
• Reduces the need for on-site technician visits.



Technical Specifications

The LG WM3400CW features a 4.5 cu. ft. capacity, 27″ width, 30.25″ depth, and 39″ height. It operates at 120 VAC, 60 Hz, with 20-120 psi water pressure.

8.1 Capacity and Performance

The LG WM3400CW offers a spacious 4.5 cu. ft. capacity, ideal for handling large or small laundry loads efficiently. Designed for optimal performance, it ensures thorough cleaning with minimal water usage. The washer features multiple cycle options to cater to different fabric types and soil levels, providing tailored care for your garments. With quiet operation and high-speed spin cycles, it reduces drying time while maintaining fabric integrity. Its robust design ensures consistent performance and reliability for years of dependable service.

• 4.5 cu. ft. interior capacity for flexible loading.
• Efficient water usage for eco-friendly operation.
• High-speed spin reduces drying time.

8.2 Energy Efficiency and Warranty

The LG WM3400CW is designed with energy efficiency in mind, featuring an ENERGY STAR certification for eco-friendly performance. It operates with reduced energy and water consumption, lowering utility costs; The washer is backed by a comprehensive warranty, including coverage for parts and labor. The warranty period varies depending on registration and adherence to maintenance guidelines. Proper usage and regular maintenance ensure extended appliance life and warranty validity, providing peace of mind for years of reliable service.

• ENERGY STAR certified for energy efficiency.
• Comprehensive warranty covering parts and labor.
• Adhere to guidelines to maintain warranty validity.



Downloading the Manual

The LG WM3400CW manual is available for free download on LG’s official website and trusted platforms like ManualsLib. Ensure authenticity by using official sources for accurate information and guidance.

9.1 Official Sources for the Manual

The official LG WM3400CW manual can be downloaded from LG’s website or trusted platforms like ManualsLib. Visit www.lg.com or search for “LG WM3400CW manual” on ManualsLib. Ensure the manual is downloaded from verified sources to avoid incorrect or unofficial versions. The PDF manual covers safety, installation, operation, and troubleshooting, making it essential for proper usage and maintenance of your washer.

9.2 Additional Resources

Besides the official manual, additional resources like YouTube tutorials and forums offer practical guides and troubleshooting tips for the LG WM3400CW. Websites such as YouTube and Reddit provide user experiences and expert advice. For comprehensive support, LG’s support page offers FAQs, repair services, and software updates. These resources complement the manual, ensuring optimal use and maintenance of your washer.

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