How to Replace Your LG Refrigerator Air Filter: A Complete Step-by-Step Guide for Homeowners​

2025-10-05

If your LG refrigerator isn’t cooling as efficiently, smells odd, or you notice ice buildup, a clogged air filter is often the culprit. Replacing the air filter is a simple yet critical maintenance task that ensures your fridge runs smoothly, keeps food fresh, and avoids costly repairs. This guide will walk you through everything you need to know: why replacing the filter matters, how to spot when it’s time, finding the right replacement part, and step-by-step instructions to do it yourself—no professional help required. By the end, you’ll have the confidence to maintain your LG fridge’s air quality and performance for years.

Why Replacing Your LG Refrigerator Air Filter Is Non-Negotiable

Your LG fridge’s air filter isn’t just an add-on; it’s a core component of its cooling and air purification system. Here’s why keeping it fresh matters:

1. ​Protects Food Quality and Safety​

The air filter traps airborne particles like dust, pollen, pet dander, and mold spores before they circulate into your fridge’s cooling system. Over time, a clogged filter can’t capture these contaminants, leading to musty odors, spoiled produce, or even bacterial growth on shelves. For families with allergies or young kids, a clean filter is a line of defense against airborne irritants affecting food.

2. ​Maintains Efficient Cooling​

A dirty filter forces your fridge’s compressor to work harder to push air through restricted passages. This extra strain increases energy consumption (by up to 15% in some cases) and shortens the lifespan of critical components like the condenser coils. Over months, this inefficiency can hike up your electricity bill and lead to premature breakdowns.

3. ​Prevents Ice Buildup and Frost​

Clogged filters reduce airflow to the evaporator coils, causing them to freeze unevenly. You might notice frost forming on walls or drawers, which not only takes up storage space but also makes defrosting a chore. In extreme cases, excessive frost can block vents and trigger error codes (like LG’s “IE” error for ice buildup).

How to Know When It’s Time to Replace Your LG Fridge Air Filter

LG recommends replacing the air filter every 6 months under normal use, but several signs may indicate it needs changing sooner:

1. ​Check the Filter Replacement Indicator Light​

Most modern LG fridges (models from 2015 onward) have a “Filter” or “Water Filter” light on the control panel. When the filter is clogged, this light turns amber or flashes. Note: Some models reset automatically after replacement, while others require manual resetting via the settings menu.

2. ​Notice Changes in Cooling or Odor​

If your fridge feels warmer than usual, items thaw faster, or you detect a stale, earthy smell, the filter is likely saturated. Even if the indicator light isn’t on, these symptoms warrant immediate replacement.

3. ​Observe Water Flow (for Models with Integrated Water Dispensers)​​

If your fridge has a water dispenser, a slow stream or no water at all can sometimes stem from a clogged air filter. The filter’s dual role (air and water filtration in some models) means blockages affect both systems.

Finding the Right Replacement Filter: Avoiding Costly Mistakes

Not all LG fridge filters are interchangeable. Using the wrong model can lead to poor filtration, leaks, or damage to your fridge. Here’s how to identify the correct part:

1. ​Locate Your Fridge’s Model Number​

The model number is usually on a sticker inside the fridge (on the ceiling or side wall) or on the back near the compressor. Write it down—this is key for finding compatible filters.

2. ​Match the Filter Part Number​

LG uses a naming convention for filters, often starting with “LT” or “ADQ.” For example:

  • ​LT1000P: Common in top-freezer models like the LRFXC2416S.

  • ​ADQ36006101: Used in bottom-freezer models like the LFX25973ST.

  • ​LG LT700P: Fits French door models with external water dispensers.

You can cross-reference your model number with LG’s official filter finder tool (available on their support website) or check the current filter’s label for its part number.

3. ​Buy from Trusted Sellers​

Avoid generic filters marketed as “universal”—they rarely fit or perform as well. Stick to LG-branded filters or reputable third-party brands like Frigidaire or EveryDrop (which often license LG’s technology). Check reviews for mentions of compatibility and filtration efficiency.

Step-by-Step Guide to Replacing Your LG Refrigerator Air Filter

Once you have the correct filter, follow these steps. Note: Instructions may vary slightly by model, so always consult your fridge’s manual first.

​Tools Needed:

  • New replacement filter (correct part number).

  • Paper towels or a cloth (to catch drips).

  • A small flashlight (optional, for hard-to-reach filters).

​Step 1: Locate the Filter Housing​

LG fridges typically house the air filter in one of three places:

  • ​Top-Freezer Models: Behind a panel in the upper right corner of the fridge compartment.

  • ​Bottom-Freezer/ French Door Models: In the bottom drawer (often labeled “Filter” or hidden behind a kick plate).

  • ​Integrated Water Dispenser Models: Inside the grille below the water dispenser.

If unsure, refer to your manual or search “[Your Fridge Model] air filter location” online for visuals.

​Step 2: Remove the Old Filter​

  • ​Twist-and-Lock Filters: Most LG filters screw in counterclockwise. Grasp the filter firmly and turn it to the left (about ¼ turn) until it loosens. Pull straight out—some models may have a release tab to press first.

  • ​Push-and-Click Filters: Less common, but some newer models use a push-button release. Press the button and pull the filter straight out.

Tip: If the filter is stuck, gently wiggle it while turning. Never use force—this could crack the housing.

​Step 3: Prepare the New Filter​

Remove the packaging and inspect the new filter for damage. Some filters come with a protective cap—twist or pull it off before installation.

​Step 4: Install the New Filter​

  • Align the new filter with the housing. Most have a notch or groove that clicks into place.

  • Push the filter in until it seats fully, then twist clockwise (for twist-lock models) until it locks. You should hear a “click” confirming it’s secure.

  • For push-and-click models, simply insert the filter until it clicks into place.

​Step 5: Reset the Filter Indicator Light​

After installation, reset the “Filter” light to avoid false alerts:

  • On most LG fridges, press and hold the “Filter” button for 3-5 seconds until the light turns off or resets.

  • For models with a touch screen, navigate to “Settings” > “Appliance Care” > “Filter Reset” and confirm.

​Step 6: Test the Fridge​

Let the fridge run for 24 hours. Check for:

  • Improved cooling (fridge temp should stabilize at 37°F/3°C, freezer at 0°F/-18°C).

  • No new odors or frost buildup.

  • Normal water flow (if applicable).

Troubleshooting Common Issues After Replacement

Even with careful installation, problems can arise. Here’s how to fix them:

​Issue 1: The Filter Light Still Blinking​

  • ​Cause: The reset wasn’t done correctly, or the filter isn’t seated properly.

  • ​Fix: Recheck the installation—ensure the filter is fully twisted or pushed in. Reset the light again, holding the button longer if needed.

​Issue 2: Weak Water Flow (Dispenser Models)​​

  • ​Cause: Air bubbles in the line or a clogged filter.

  • ​Fix: Run water for 2-3 minutes to flush air. If it persists, double-check the filter is the correct model—some filters have different flow rates.

​Issue 3: Lingering Odors​

  • ​Cause: The old filter may have released trapped odors, or there’s a separate issue (e.g., spilled milk in a drawer).

  • ​Fix: Wipe down shelves and drawers with a vinegar-water solution. Leave an open box of baking soda in the fridge for 24 hours to absorb odors.

Maintaining Your LG Fridge’s Air Filter Long-Term

Replacing the filter every 6 months is the foundation, but these habits extend its life and your fridge’s performance:

  • ​Clean the Filter Housing: Wipe the area around the filter with a damp cloth monthly to prevent dust buildup.

  • ​Check for Leaks: After installation, inspect the housing for drips—especially if you have hard water. A small leak can damage shelves over time.

  • ​Monitor Usage Habits: If you cook often, have pets, or live in a dusty area, replace the filter every 3-4 months.

Final Thoughts: Investing in Maintenance Saves Time and Money

Replacing your LG refrigerator’s air filter is a quick, low-cost task with big rewards: fresher food, lower energy bills, and fewer repair headaches. By following this guide—identifying the right filter, installing it correctly, and staying alert to warning signs—you’ll keep your fridge running like new for years. Don’t wait for odors or warm temps to strike; make filter replacement a regular part of your home maintenance routine. Your future self (and your groceries) will thank you.

BACK