How to Change a Refrigerator Water Filter

Many homeowners overlook changing their refrigerator water filter, but this small task can keep your water fresh, clean, and free from contaminants. Over time, a clogged filter can affect water quality, slow down flow, and even impact your fridge’s performance. Fortunately, replacing a fridge water filter is quick and easy, no matter the brand or model. In this guide, we’ll cover everything you need to know—from when to replace your filter to step-by-step instructions for different types of filter types.

When to replace your fridge filter

Most refrigerator manufacturers recommend changing the water filter every six months, but this timeline can vary based on several factors, including water quality, your refrigerator model, and household water usage. 

Replacing the filter on time ensures that your drinking water remains clean, fresh, and free from harmful contaminants such as chlorine, lead, and sediment. If you don’t replace the filter when you need to, it can get clogged with debris and bacteria, reducing its effectiveness and potentially affecting the taste and odor of your water and ice.

Learn more: How often to replace your refrigerator water filter | Do refrigerator filters really work?

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Types of refrigerator water filters 

There are several types of refrigerator water filters, each designed for specific fridge models and filtration needs.

1. Twist-in filters

Twist-in filters are among the most common types of refrigerator water filters. These are typically found inside the fridge, either in the upper right corner or near the bottom. Twist-in filters are convenient, only requiring a simple twist to remove and replace. To install a new filter, align it with the housing and twist it clockwise until it locks into place. 

These filters effectively remove chlorine, lead, and sediment. Brands like Whirlpool, GE, and Samsung frequently use this filter style, making it easy for you to maintain their fridge’s water filtration system without specialized tools.

See our recommendations for twist-in filters:

GE MWF Refrigerator Filter SmartWater Compatible Filter by Neo-Pure

$18.50

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Samsung DA2900020B Compatible Replacement Fridge Filter by Neo-Pure

$18.66

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2. Drop-in filters

Drop-in filters are commonly housed inside a compartment within the refrigerator, often near the top. These filters are designed for quick replacement by simply pressing a release button or pulling a tab, which allows the filter to drop down. Once removed, a new filter is inserted and secured with a gentle push. 

This type of filter is widely used in brands like LG, Frigidaire, and Maytag. The drop-down design keeps the filter discreet while ensuring it remains easily accessible. 

Our recommended drop-in filter:

LG LT700P Compatible Replacement Fridge Filter by Neo-Pure

$22.68

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3. Inline filters

Inline filters are external filters installed along the refrigerator's water supply line, usually behind or beneath the appliance. They are ideal for refrigerators without built-in filtration systems, including older models and basic fridge designs. Installation involves cutting the water line and attaching the filter using compression fittings or quick-connect couplings. 

Shop inline filters →

4. Grille (base-grille) filters

Grille filters, also known as base-grille filters, are installed in the lower front section of the refrigerator, typically in side-by-side and French door models. These filters are designed for easy access and can be removed either by pushing a release button or twisting them out of their housing. Since they are located near the base of the fridge, they help maximize internal storage space while still providing effective filtration. 

Our favorite grille filter:

LG LT600P(B) Compatible Replacement Fridge Filter by Neo-Pure

$14.80

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5. Rear filters

Rear-mounted filters are typically found on the exterior back panel of older refrigerators or models without built-in internal filtration. To replace them, you have to move the refrigerator away from the wall to access the filter housing. While this placement can make replacement slightly less convenient, rear filters still offer effective water purification by eliminating common contaminants like rust, chlorine, and organic compounds. 

Since they are installed externally, they can be replaced without opening the fridge, which can be beneficial in certain setups. These filters are often used in older models where internal filtration was not yet a standard feature.

How to change your refrigerator water filter

Different refrigerator models use various filter types, each with its own installation process. Though most refrigerators don’t require you to shut off the water supply before changing the filter, some brands do, which is why it’s crucial to consult your fridge’s manual for any specific instructions.

If you can’t locate your fridge’s manual, turn off the water supply just in case, then find the right steps for your fridge model below. 

Changing twist-in fridge filters

Location: Upper right corner or near the bottom, depending on the model.

1. Remove the old filter: Grasp the filter and turn it counterclockwise to release it from the housing. Some models may require pressing a button before twisting. Have a towel ready to catch any dripping water.

2. Insert the new filter: Align the new filter with the housing and twist it clockwise until it locks securely into place. Ensure it is properly seated to prevent leaks.

3. Flush the system: Run at least 2–3 gallons of water through the dispenser to remove air and any carbon residue from the new filter. This ensures clean, fresh water for drinking and ice production.

Changing drop-in fridge filters

Location: Inside the fridge, typically near the top.

1. Open the filter compartment: Locate the drop-down filter compartment and press the latch or open the cover to access the filter.

2. Remove the old filter: Press the release button or gently pull the old filter straight out. Some models may require a slight downward tilt before removal.

3. Insert the new filter: Push the new filter into the slot until it clicks into place. Ensure it is properly aligned and fully seated.

4. Close the compartment and flush the system: Secure the compartment cover back in place. Then, run at least 2–3 gallons of water through the dispenser to clear out air pockets and residual particles.

Changing inline fridge filters

Location: Mounted behind fridge, either on wall or fridge itself.

1. Turn off the water supply: Locate the shutoff valve on the refrigerator's water supply line (usually under the sink or behind the fridge) and turn it off to prevent leaks.

2. Disconnect the old filter: Use a wrench or press the quick-connect fittings to detach the old filter from both ends of the water line. Have a bucket or towel handy for any excess water.

3. Attach the new filter: Connect the new filter to both ends of the water line, ensuring a tight fit. If using compression fittings, tighten them securely to prevent leaks.

4. Turn the water back on and flush the system: Restore water flow and run about 2–3 gallons through the dispenser to clear out air and activate the filter media.

Changing grille (base-grille) fridge filters

Location: Lower front of the refrigerator, usually inside the grille. 

1. Remove grill cover: Some models have a cover that needs to be removed first. Unscrew or twist this cover to access the filter.

2. Lay a towel down: In case of leaks, lay a small towel below the filter compartment while you work.

3. Remove the old filter: Press the eject button or twist the filter counterclockwise to release it. If it doesn’t release easily, check for a locking mechanism.

4. Insert the new filter: Align the new filter with the slot and push or twist it into place until it locks securely. Make sure it sits flush with the grille.

5. Flush the system: Run at least 2–3 gallons of water through the dispenser to remove trapped air and any loose carbon particles.

Changing rear (back-of-fridge) fridge filters

Location: Back panel of the fridge.

1. Turn off the water supply: Locate the shutoff valve behind the fridge or under the sink and turn it off to prevent leaks during the replacement process.

2. Move the fridge forward: Carefully pull the refrigerator away from the wall to access the back panel. Be mindful of the water line to avoid damage.

3. Remove the old filter: Depending on the model, the filter may be screwed in or attached with a quick-connect fitting. Use a wrench if necessary to loosen the connection.

4. Install the new filter: Attach the new filter securely, ensuring all connections are tight to prevent leaks.

5. Turn the water back on and flush the system: Restore water flow and run at least 2–3 gallons through the dispenser to clear out air and any residual particles from the new filter.

Tips for replacing your refrigerator water filter

Keep a spare filter on hand

It’s a good idea to buy a replacement filter ahead of time so you're ready when it’s time to swap. Running your fridge without a functional water filter can result in poor water quality and potential health risks. Having an extra filter also prevents any last-minute trips to the store or delays in finding the right model.

Label the new filter with the installation date

To track when your filter needs to be replaced, use a marker or sticker to write down the installation date on the filter itself or on a nearby surface, such as the inside of the fridge door. Some refrigerators have built-in filter replacement reminders, but if yours doesn’t, setting a reminder on your phone or calendar can help ensure timely replacements.

Don’t overtighten the filter

When installing the new filter, twist only until snug—do not overtighten. Applying too much force can crack the filter housing, damage the internal components, or make removal difficult the next time you need to replace it. A properly installed filter should feel secure but still be easy to remove when necessary.

Wet the O-ring before installation

For drop-in or twist-in that use O-rings, lightly wetting the O-ring with clean water before installation helps create a better seal and prevents leaks. This also makes it easier to insert and remove the filter when it’s time for the next replacement.

Flush the system more thoroughly if needed

After replacing the filter, run at least 2–3 gallons of water through the dispenser to clear out any air pockets and residual carbon particles. If the water appears cloudy or contains small black specks, this is normal—it’s loose carbon from the filter. In this case, flushing with 3–5 gallons will help clear the system before drinking.

Check for compatibility before buying

Not all filters fit all refrigerators, even if they look similar. Before purchasing a replacement, check your fridge manual for the correct model number and filter type. Some aftermarket filters may be cheaper, but they might not filter contaminants as effectively as OEM filters. If you opt for a third-party filter, look for NSF-certified options to ensure proper filtration.

Inspect the old filter for issues

After removing the old filter, examine it for unusual buildup, slime, or excessive dirt. If the filter looks extra clogged or slimy, it may indicate hard water buildup or excessive contaminants in your water supply. In these cases, you should test your water quality or add a pre-filter to extend the life of your refrigerator filter.

Run the ice maker a few times after replacement

If your refrigerator has an ice maker, discard the first batch of ice after installing a new filter so that any trapped air, carbon particles, or residual manufacturing debris do not affect the quality of your ice. Running the ice maker a couple of times helps clear out any impurities.

Do you need to change your refrigerator air filter?

Many modern refrigerators also have an air filter, which helps reduce odors and keep the fridge smelling fresh. Like water filters, air filters should be replaced regularly to maintain optimal effectiveness.

Learn more: Are refrigerator air filters necessary?

When to change the air filter

You should change your fridge's air filter about every 6 months, or as recommended by the manufacturer. However, some factors may require more frequent replacements. 

Here are a few signs your air filter may need changing:

• Odors persist despite cleaning: If your fridge still smells bad even after removing spoiled food and cleaning the interior, the air filter may be saturated and ineffective.

• Increased moisture or mold growth: A clogged air filter can reduce airflow, leading to excess moisture buildup and potential mold or mildew inside the fridge.

• Poor air circulation: If you notice food spoiling faster or a musty smell lingering, it could be due to restricted airflow caused by a dirty filter.

• High usage: If your refrigerator is frequently opened, especially in a large household, the air filter may become dirty more quickly and need replacing sooner.

How to change a refrigerator air filter

Changing a refrigerator air filter is a simple process that usually takes just a few minutes. Follow these steps to replace your fridge’s air filter efficiently:

• Locate the air filter: Most air filters are found inside a small compartment on the back wall, side wall, or top interior of the refrigerator. Consult your fridge’s user manual if you’re unsure of its exact location.

• Open the filter compartment: If the filter is housed in a cover or casing, press the release tab or unscrew the cover to access the old filter. Some filters are held in place with clips, while others simply slide or twist out.

• Remove the old filter: Take out the old air filter by pulling it straight out or twisting it counterclockwise, depending on the model. If the filter is stuck, gently wiggle it while pulling to loosen it.

• Install the new filter: Unwrap the new air filter and align it with the compartment. Insert it into place, ensuring it sits snugly. If it’s a twist-in filter, turn it clockwise until secure.

• Close the compartment: Reattach the cover or filter housing if necessary. Make sure it clicks or locks into place.

• Reset the filter indicator: Many refrigerators have an air filter status indicator that needs to be reset after installing a new filter. Press and hold the designated reset button (often located on the control panel) for 3–5 seconds or follow your fridge’s manual instructions.

• Check for proper airflow: Close the fridge door and ensure no obstructions are blocking the vents. Over the next few hours, you should notice improved air circulation and fresher-smelling air inside the fridge.

How to change your LG, Samsung, or Kenmore fridge filter 

How to change an LG fridge water filter

How to change a Samsung fridge water filter

How to change a Kenmore Elite fridge water filter

How to change a Whirlpool fridge water filter

Keep your fridge water fresh and pure

Changing your refrigerator water filter is a simple yet essential task that ensures your drinking water and ice remain fresh, clean, and free from contaminants. By following the correct steps for your specific filter type, you can keep your fridge’s water system functioning efficiently. Remember to replace your filter every six months or sooner if you notice reduced water flow, strange tastes, or lingering odors. 

Browse through our selection of replacement fridge water filters or reach out to the experts at Fresh Water Systems with any questions! With decades of experience in water treatment and filtration, we’ll help you find the perfect solution for your needs.

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