How to Choose, Replace, and Maintain Your LG Refrigerator Air Filter: A Comprehensive Guide for Homeowners​

If you own an LG refrigerator, understanding how to properly select, replace, and maintain its air filter is critical to preserving food freshness, eliminating odors, and ensuring your appliance runs efficiently. Over time, airborne particles like dust, pet dander, cooking smells, and mold spores accumulate in your fridge’s airflow system, compromising its ability to circulate clean air. A clogged or outdated air filter not only leads to stale or foul-smelling food but can also strain your refrigerator’s compressor, shortening its lifespan. This guide will walk you through every step—from identifying your filter type to troubleshooting common issues—so you can keep your LG fridge performing at its best.

Why Your LG Refrigerator Air Filter Matters More Than You Think

LG refrigerators are engineered with advanced cooling and storage technologies, but their air filtration systems are often overlooked. Here’s why this component deserves your attention:

1. ​It Keeps Food Fresh and Odor-Free​

Your fridge’s air filter works like a sponge for unwanted particles. Most LG models use activated carbon filters, which absorb volatile organic compounds (VOCs), cooking odors (think garlic, fish, or leftovers), and even ethylene gas—a natural ripening agent that speeds up spoilage. Without a functioning filter, these odors circulate freely, causing even sealed items like milk or vegetables to absorb unwanted smells.

2. ​It Protects Your Fridge’s Longevity​

A dirty air filter forces your refrigerator’s fan to work harder to push air through the system. This extra strain increases energy consumption and can overheat the compressor, a costly component to repair or replace. By keeping the filter clean, you reduce wear and tear, extending your fridge’s operational life by years.

3. ​It Improves Energy Efficiency​

When airflow is restricted by a clogged filter, your fridge struggles to maintain consistent temperatures. This inefficiency shows up on your energy bill—studies show a dirty filter can increase energy use by 5–15% monthly. Replacing the filter regularly keeps your fridge running smoothly and lowers utility costs.

Step 1: Identify Your LG Refrigerator’s Air Filter Model

Before purchasing a replacement, you need to know exactly which filter your LG fridge uses. LG uses several filter types across its lineup, and using the wrong one can lead to poor fit, reduced filtration, or even damage to your appliance. Here’s how to find yours:

Check Your Refrigerator’s Manual

The quickest way to identify your filter is to consult your owner’s manual. Look for a section titled “Maintenance” or “Air Filter Replacement”—it will list the part number (e.g., “LG LT1000P Filter” or “LG DA97-08178A”). If you’ve misplaced the manual, download a digital copy from LG’s official support website using your fridge’s model number (located on a sticker inside the fridge or on the back panel).

Inspect the Existing Filter

If you can access the old filter, remove it and check for labels. Most LG filters have a sticker with a part number, such as “ADQ36006101” or “CO29968101.” Note this number—retailers and LG’s site use it to match replacements.

Use LG’s Online Filter Finder Tool

LG’s website offers a handy “Find My Filter” tool. Enter your fridge’s model number (found on the interior ceiling or back of the unit), and the tool will display compatible filters. This is especially useful if you can’t locate the manual or old filter.

Common LG Filter Series

LG categorizes its air filters into a few key series:

• ​ADQ Series: Used in many top-freezer and French door models (e.g., ADQ36006101).

• ​CO Series: Found in bottom-freezer and side-by-side fridges (e.g., CO29968101).

• ​LT Series: For larger capacity or premium models (e.g., LT1000P).

Step 2: Choosing the Right Replacement Filter—Key Considerations

Not all LG air filters are created equal. To ensure optimal performance, focus on these factors:

Compatibility Is Non-Negotiable

Always match the filter’s part number to your fridge’s requirements. Even if two filters look similar, slight differences in size or airflow design can prevent proper sealing, allowing unfiltered air to bypass the system. Third-party “universal” filters may claim compatibility, but they often lack the precise engineering of OEM (Original Equipment Manufacturer) parts. Stick to LG-branded filters or reputable third-party brands that explicitly list compatibility with your model.

Filtration Efficiency Matters

LG air filters typically use activated carbon to trap odors and particles. Look for filters labeled with a minimum efficiency reporting value (MERV) of 8–10, though most LG models don’t advertise MERV ratings—instead, they emphasize odor reduction. High-quality filters will list their carbon content (e.g., “100% virgin activated carbon”)—more carbon means better absorption. Avoid filters with low carbon density, as they’ll become saturated faster and lose effectiveness.

Check for Additional Features

Some premium LG filters include anti-microbial coatings to inhibit mold growth, while others have enhanced seals to prevent air leakage. If you store strong-smelling foods (cheese, cured meats) or live in a humid climate, opt for a filter with these extras to maximize odor control.

Step 3: Replacing Your LG Refrigerator Air Filter—A Step-by-Step Guide

Once you have the correct replacement filter, follow these steps to install it safely and effectively:

Gather Tools and Prepare

You’ll need:

• The new filter.

• A soft cloth or paper towel (to wipe away dust).

• Gloves (optional, but recommended to avoid touching dirty surfaces).

First, unplug your refrigerator or turn off its ice maker/water dispenser (if connected to the same power source). This prevents electrical accidents and stops water flow during installation.

Locate the Filter Housing

LG refrigerators house air filters in one of three places:

• ​Inside the fridge, near the top: Most French door and top-freezer models have a filter slot behind a small door or grille, often labeled with a filter icon.

• ​In the grille at the base of the fridge: Bottom-freezer models may hide the filter behind a kick plate or lower front grille. Use a screwdriver to remove the grille if needed.

• ​In the water filter housing: Some models combine water and air filters in the same compartment—check your manual to confirm.

Remove the Old Filter

Grasp the filter firmly and pull straight out. It may be attached via a twist-lock mechanism—rotate counterclockwise to release it. Once removed, inspect the old filter: if it’s black with grime or saturated with liquid, note that this indicates heavy use and confirms the need for regular replacement.

Clean the Housing

Wipe the filter housing with a damp cloth to remove dust or debris. This ensures a tight seal for the new filter and prevents contaminants from bypassing the system.

Install the New Filter

Align the new filter with the housing—most have a notch or tab that clicks into place. Push gently until it’s fully seated, then twist clockwise (if required) to lock it. Some models have a “push-to-lock” design; you’ll feel a click when it’s secure.

Test the System

Plug your fridge back in and restore power to the ice maker/dispenser. Run the fridge for 24 hours to allow the new filter to cycle air. Afterward, check for improved odor control and listen for the fan—no unusual noises mean the filter is seated correctly.

Step 4: Maintaining Your LG Air Filter for Long-Term Performance

Replacing the filter is just the start. Proper maintenance ensures it works as intended between changes:

Track Replacement Dates

Mark your calendar or set a phone reminder to replace the filter every 6–12 months. Exact timing depends on usage: if you open the fridge frequently, store smelly foods, or live in a dusty area, replace it every 6 months. For lighter use, 12 months is safe.

Check the Pre-Filter (If Applicable)

Some LG models include a washable pre-filter, usually located behind a small panel near the main air filter. This pre-filter catches large particles (dust, pet hair) before they reach the carbon filter. Remove it monthly, rinse with warm water, and let it dry completely before reinstalling. A clean pre-filter extends the main filter’s life by 20–30%.

Monitor for Warning Signs

Your fridge may alert you when the filter needs replacement—look for a blinking light or an error code (e.g., “Filter” or “ODOR” on the display). If you notice persistent odors, reduced airflow (food spoils faster), or higher energy bills, replace the filter even if it’s not yet due.

Store Filters Properly

If you buy in bulk, store extra filters in a cool, dry place away from direct sunlight. Avoid crushing or bending them, as this can damage the carbon structure and reduce effectiveness.

Troubleshooting Common LG Air Filter Issues

Even with proper care, you may encounter problems. Here’s how to fix them:

“Filter” Light Stays On After Replacement

This usually means the filter isn’t seated correctly. Remove it, check for debris in the housing, and reinstall, ensuring it clicks or twists into place. Some models require pressing the “Reset” button on the fridge’s display after installation.

Lingering Odors Post-Replacement

If smells persist, the pre-filter may be clogged—clean or replace it. Also, check for spoiled food hidden in crisper drawers or behind shelves. Wipe down fridge interior with a baking soda solution (1 cup baking soda + 1 quart water) to neutralize lingering odors.

Reduced Airflow or Noisy Fan

A dirty filter forces the fan to work harder, causing noise. Replace the filter immediately. If the noise continues, the fan motor may be damaged—contact LG support for repair.

Where to Buy Genuine LG Refrigerator Air Filters

To ensure quality and compatibility, purchase filters from trusted sources:

• ​LG’s Official Website: Offers genuine parts with fast shipping.

• ​Amazon: Look for LG-certified sellers with high ratings.

• ​Appliance Retailers: Stores like Best Buy or Home Depot carry LG filters, often with in-store pickup.

Avoid generic filters sold on unverified sites—they may not meet LG’s standards and could void your warranty.

Final Thoughts: Investing in Your Fridge’s Health

Your LG refrigerator’s air filter is a small component with a big impact. By understanding how to choose, replace, and maintain it, you’ll keep food fresh, reduce odors, and extend your appliance’s life—all while saving money on energy and repairs. Make filter replacement a part of your regular home maintenance routine, and your LG fridge will thank you with years of reliable service.

Remember: When in doubt, consult your owner’s manual or reach out to LG’s customer support for model-specific advice. With the right care, your fridge will continue to be a cornerstone of your kitchen for decades.