How to Replace a Refrigerator Water Filter (General Guide)

Replacing a refrigerator water filter is one of the easiest appliance maintenance tasks in any home. The job itself takes about two minutes once the correct filter is in hand. What slows most people down is the step before that -- identifying the right cartridge and understanding the installation style their fridge uses. This guide covers both, along with the flush and reset steps that are easy to forget but genuinely matter.

Before You Start: Find the Right Filter

Refrigerator filters are not universal. Two cartridges can look nearly identical and fit completely differently, so buying by appearance or guessing based on size will often result in the wrong part. There are two reliable ways to identify the correct replacement.

The faster method is to remove the existing filter from the fridge -- the water shuts off automatically when it releases -- and read the part number printed on the cartridge label. Common numbers include EDR1RXD1, EDR4RXD1, MWF, RPWF, LT700P, DA29-00020B, and WF2CB, among many others. Enter that number directly into the DFS search bar and compatible replacements appear immediately.

If the filter is already discarded or the label is unreadable, the DFS Fridge Filter Finder walks through a short series of questions by brand, style, and filter location to recommend the correct match. Your refrigerator's model number -- printed on a sticker inside the door frame or behind the crisper drawer -- can also be entered into the search bar directly. For a thorough overview of filter identification, replacement schedules, and reset instructions by brand, the fridge filter buying guide is the most complete reference on the DFS site.

Once you have the correct filter confirmed and in hand, the replacement itself is the same short sequence regardless of brand.

Identify Your Filter's Installation Style

The removal and installation method depends on where the filter sits in the refrigerator. The table below covers the most common configurations.

Brand-specific installation walkthroughs are available on DFS for Whirlpool filters, Kenmore filters, and Samsung filters, and the general removal and installation guide covers most other configurations.

Step-by-Step: How to Replace the Filter

Step 1 -- Prepare. Have the new filter unpacked and ready before removing the old one. Keep a small towel nearby -- a few drops of water may release when the old filter comes out. There is no need to shut off the water supply on most refrigerators; the housing seals automatically when the filter is removed. Samsung models are an exception and may require closing the water supply valve first -- the instructions included with the filter will confirm this.

Step 2 -- Remove the old filter. Follow the installation style for your filter location from the table above. Do not force anything. If the filter does not move freely, check whether a button needs to be pressed first, a cover needs to be opened, or the filter needs to be turned before pulling. Comparing the old filter side-by-side with the new one before installation confirms the connection style matches.

Step 3 -- Install the new filter. Remove any protective caps from the O-rings or connections on the new filter before installation. Align the filter with the housing guides and push it fully into place, then twist or press until it locks. A correctly installed filter feels secure with no wobble or resistance. The most common installation error is a filter that is 90% seated but not fully locked -- this restricts flow or causes dripping even though the filter appears to be in place. If water does not flow from the dispenser after installation, remove the filter and reseat it firmly.

Step 4 -- Flush the new filter. Run 2 to 4 gallons of water through the dispenser and discard it before drinking. New filters contain harmless carbon fines and trapped air from packaging that produce cloudy or sputtering water for the first few glasses. Flushing clears this quickly. The LT700P Tier1 replacement recommends flushing approximately 2 gallons; the EDR4RXD1 and Whirlpool-family filters recommend 3 to 4 gallons. When in doubt, flush until the water runs clear and sputtering stops.

Step 5 -- Reset the filter indicator. Most refrigerators do not automatically detect a new filter -- the reminder light must be reset manually after installation. The table below covers the most common reset methods by brand.

Step 6 -- Verify. Check for drips around the filter housing and confirm the dispenser is flowing normally. Water pressure should restore to its standard rate within a glass or two after the flush. Clear, normally flowing water and no leaks at the housing confirm a successful installation.

How Often to Replace a Refrigerator Filter

Most filters are rated for 6 months or 200 to 500 gallons, whichever comes first. Gallon ratings vary by filter: the EveryDrop EDR1RXD1 is rated for 200 gallons, while the EDR4RXD1 is rated for 200 gallons and the Tier1 LT700P for up to 200 gallons as well. Some filters such as the Tier1 Plus EDR5RXD1 are rated for up to 400 gallons. Check the product page for your specific filter to confirm its rated capacity.

Households with higher water usage, hard water, or elevated sediment in the supply will typically reach the filter's capacity before the six-month mark. Slow dispenser flow, returning chlorine taste or odor, and cloudy ice are all reliable signals the filter needs changing regardless of where the calendar sits. An overdue filter does not just stop filtering -- it can release previously captured contaminants back into the water supply, which is a stronger reason to stay on schedule than the indicator light alone.

For the full range of replacement filters across all major brands, the refrigerator filters collection at DFS covers every current configuration. Households that want broader contaminant protection -- including lead, mercury, pharmaceuticals, and emerging contaminants -- should look at the Tier1 Plus refrigerator filters collection, which carries NSF 53 and NSF 401 certified options for most major fridge platforms.

Questions about which filter fits your refrigerator? Call the DFS team at 1-800-277-3458.

Frequently Asked Questions

How do I find the right replacement filter for my refrigerator? Remove the current filter and read the part number printed on the cartridge -- this is the most reliable method. Alternatively, enter your refrigerator's model number into the DFS search bar, or use the Fridge Filter Finder to identify compatible options by brand and filter location. Refrigerator filters are not universal, so confirming the correct part number before ordering prevents a misfit.

Do I need to turn off the water supply to change a refrigerator filter? On most refrigerators, no. The filter housing is designed to seal automatically when the cartridge is removed, preventing water from flowing. Samsung refrigerators are a notable exception -- those models typically require closing the water supply valve before removal. The installation instructions included with the replacement filter will specify if a shutoff is needed.

Why is my water cloudy or sputtering after installing a new filter? Cloudiness and sputtering in the first several glasses after a new filter installation are caused by carbon fines and trapped air released from the new cartridge during packaging. Both clear quickly once 2 to 4 gallons have been flushed through the dispenser. If cloudiness or sputtering continues past that point, remove the filter and confirm it is fully seated and locked.

What happens if I do not flush the new filter before drinking? The first water through an unflushed filter typically carries harmless carbon dust that makes the water appear gray or cloudy. The taste may also be affected. The carbon fines are not a health hazard, but flushing before use produces noticeably better-tasting water from the first glass and confirms the cartridge is seated correctly.

Why is the filter indicator light still on after I installed a new filter? The filter indicator is a timer-based reminder, not a sensor that detects whether a new filter is present. It must be reset manually after every replacement. The reset method varies by brand -- see the reset table in this guide for step-by-step instructions by manufacturer.

How do I know if my refrigerator filter is installed correctly? A correctly installed filter locks firmly into the housing with no wobble, sits flush with the housing face, and allows normal water flow from the dispenser immediately after flushing. If the filter appears seated but water does not flow, or if it drips at the housing, remove it and reinstall with firm pressure until the lock engages completely.

Can I use a compatible replacement filter instead of the OEM brand? Yes. Compatible filters from certified brands like Tier1 and Tier1 Plus are designed to fit the same housing and meet the same NSF performance standards as OEM cartridges. The key is verifying that the replacement carries the appropriate NSF certifications for your household's filtration needs -- NSF 42 for chlorine and taste, NSF 53 for lead and health contaminants, and NSF 401 for pharmaceuticals and emerging contaminants.

What if my filter model number is discontinued? Discontinued OEM filter models almost always have a compatible current replacement that fits the same housing. The DFS search bar and Fridge Filter Finder both recognize discontinued model numbers and surface currently available compatible options. The physical fit and connection style of a filter housing rarely changes even when the part number is updated.