Where the LG air filter sits and why it matters

Most LG refrigerators have an air filter that lives in one of two places: inside the fridge compartment near the top back wall, or in a housing unit mounted on the exterior wall of the fridge. The filter traps odors, mold spores, and ethylene gas — a natural ripening agent that spoils produce faster. A clogged filter stops doing this job, so your lettuce wilts quicker and your fridge smells like old fish.

LG recommends replacing the filter every six months if you use the fridge heavily, or once a year for normal households. You will know it is time when the filter looks dark gray or brown instead of white, or when odors linger despite cleaning. The replacement takes about five minutes and costs between $25 and $60 depending on your model.

Key Takeaways

  • LG air filters sit either inside the fridge near the top back or in an external housing on the side or back wall — check your manual to find yours.
  • Most filters twist counterclockwise to remove and twist clockwise to install, but some slide straight out — your manual will show which type you have.
  • You do not need tools or special knowledge; the filter is designed to come out by hand in under a minute.
  • Buying the correct replacement model number matters — an LT120F works only on certain models, while an LT500P works on others, so verify before ordering.
  • After installation, some models require you to reset the filter indicator light by holding a button for three seconds.

Finding your model number and the correct replacement filter

Open your refrigerator door and look for a sticker on the inside wall, usually on the left side or the ceiling. This sticker lists your model number — it will look like LRMVS3006S or LRFVS3006S. Write this number down or take a photo.

Go to LG's parts website (parts.lg.com) or call LG customer service at 1-800-243-0000 with your model number. They will tell you the exact filter part number you need. Common LG filters include the LT120F, LT500P, ADQ73214404, and LT700P, but only one will fit your specific model. Buying the wrong one wastes money and will not install.

You can also check your refrigerator's manual — the filter part number is usually printed on the inside cover or in the maintenance section. If you no longer have the manual, LG's website lets you read it by model number.

Locating and removing the old filter

Check your manual or the filter housing itself for a label that says "Push" or "Twist" — this tells you how to remove it. If the filter is inside the fridge, it is usually mounted horizontally near the top back corner, sometimes behind a small plastic cover you have to pop off first. If it is external, look on the back or side wall of the fridge for a cylindrical housing about the size of a soda can.

For twist-out filters, grip the filter firmly and turn it counterclockwise — it should rotate about a quarter turn before it comes free. For push-out filters, press inward on the center or the sides until you hear a click, then slide it straight out. Do not force it; if it is stuck, you may have the wrong removal direction.

Once the old filter is out, look inside the housing. You will see a rubber gasket or O-ring around the opening. Wipe this gasket with a dry cloth to remove dust and debris — a dirty gasket can cause the new filter to leak or not seal properly.

Installing the new filter

Before you open the new filter box, check that the part number on the box matches your model number. Unbox the filter and inspect it for damage — the rubber gasket should be intact and the filter material should not be crushed or torn.

For twist-in filters, align the filter with the housing opening and push it in gently until it seats. Then turn it clockwise about a quarter turn until you feel resistance — you will hear a soft click when it locks. Do not over-tighten; the filter should feel snug but not forced. For slide-in filters, straightforward push the filter straight into the housing until it clicks or seats fully.

Close any plastic cover you removed, and close the refrigerator door. The filter is now installed.

Resetting the filter indicator light

Many LG models have a filter indicator light on the control panel that tells you when the filter needs replacing. After you install a new filter, this light will stay on until you reset it — the fridge does not know you changed the filter automatically.

Look at your control panel for a button labeled "Filter Reset," "Ice/Water," or sometimes just a small unmarked button. Hold this button for three to five seconds until the light blinks or turns off. Your manual will show exactly which button and how long to hold it for your model. If you cannot find the button, call LG at 1-800-243-0000 and they will walk you through it in under a minute.

If you skip this step, the light will keep warning you even though the filter is new, and you may miss the actual replacement date six months from now.

What to do with the old filter

LG air filters are not recyclable in most curbside programs because they contain activated carbon and other materials that sorting facilities cannot process. Throw the old filter in the trash. Do not pour water through it or try to clean and reuse it — the carbon is spent and will not work again.

Some retailers like Best Buy accept old appliance filters for recycling, but this is not common. Call your local waste management office if you want to confirm whether your area has a special program, but the trash bin is the standard route.

Frequently Asked Questions

Can I use a third-party filter instead of an LG brand filter?

Third-party filters made by brands like Waterdrop or Everydrop are often cheaper and work in LG fridges, but they may not fit as snugly or seal as well. If you choose a third-party filter, buy one specifically designed for your LG model number, not a generic "LG-compatible" filter. Test the seal by running water through the dispenser if your fridge has one — if water leaks around the filter housing, the fit is wrong.

What if the filter is stuck and will not twist out?

Do not force it — you can crack the housing. Try turning it the opposite direction first to make sure you are not twisting the wrong way. If it still will not budge, grip the filter housing itself with one hand to keep it steady, then twist the filter with the other hand. If it is still stuck after a minute of gentle effort, call LG customer service; the housing may be defective.

How do I know if my filter is actually clogged?

A clogged filter looks dark gray or brown and feels heavy when you hold it. A clean filter is white or off-white and feels light. If your filter looks clean but your fridge smells bad, the problem is usually spilled food or a dirty drain pan, not the air filter. Check the drain pan under the fridge and the drain hole at the back of the fridge compartment.

Do I need to turn off the fridge before replacing the filter?

No. You can replace the filter while the fridge is running. The filter is not connected to any electrical parts, so there is no shock risk. Turning off the fridge is not necessary and will only warm up your food.

What if I install the filter backwards?

Most LG filters are designed to fit only one way — the gasket or the shape of the filter will not allow it to seat if you reverse it. If the filter does not click or seat smoothly, remove it and flip it around. If it still will not fit, you have the wrong filter model for your fridge.