Replacing a KitchenAid water filter takes about five minutes and requires no tools

Most KitchenAid refrigerators have a water filter that sits inside the fridge or on the back exterior wall. The filter catches sediment, chlorine, and other particles from your water supply before it reaches the ice maker and water dispenser. Over time—usually every six months to a year, depending on your water quality—the filter becomes saturated and stops working well. Replacing it is straightforward: you locate the filter, twist or pull it out, and screw or slide a new one in.

The exact steps depend on whether your model has an internal filter (inside the fridge, usually in the upper right corner) or an external filter (on the back wall). Both types use the same basic mechanism, and both are inexpensive to replace. You do not need a plumber or any special equipment.

Key Takeaways

  • KitchenAid water filters are located either inside the refrigerator compartment (usually upper right) or on the exterior back wall, depending on your model.
  • Internal filters twist counterclockwise to remove; external filters either twist out or slide out depending on the model year.
  • Before installing a new filter, flush the system by running water through the dispenser for 3 to 5 minutes to clear air and debris.
  • Replacement filters cost between $30 and $60 and should be changed every 6 to 12 months, or sooner if water flow slows noticeably.
  • If water stops flowing after you install a new filter, the filter may be installed backward or the air lock may not have cleared.

Locating your filter: inside or outside

Open your refrigerator and look in the upper right corner of the interior. If you see a cylindrical cartridge with a plastic cap, that is an internal filter. It will be mounted horizontally on the wall or in a small housing. If you do not see one inside, walk around to the back of the refrigerator. External filters are usually mounted on the back wall near the bottom, in a small plastic canister that sticks out slightly.

Check your model number if you are unsure. It is printed on a sticker inside the fridge, usually on the wall above the vegetable drawer or on the side wall. Write down the full model number and search "[your model number] water filter location" online—KitchenAid's website will show you a diagram. Knowing which type you have before you start saves time and prevents confusion.

Removing an internal filter

Internal filters are held in place by a threaded cap. Locate the filter cartridge in the upper right corner. You will see a plastic housing with a cap on the end facing into the fridge. Grip the cap firmly and turn it counterclockwise—about a quarter turn usually releases it. Once loose, pull the entire cartridge straight out toward you. Some models require a gentle wiggle as you pull; do not force it.

When the old filter comes out, you may see a small amount of water drip. This is normal. Have a towel ready. If water continues to flow, turn off the water supply to the refrigerator using the shut-off valve behind the fridge (usually a small knob on the wall or the water line itself). Once the filter is out, you can proceed to installation.

Removing an external filter

External filters sit in a canister on the back of the refrigerator. Some models use a twist-off design: grip the canister firmly and turn it counterclockwise until it releases. Others use a slide-out cartridge: look for a release button or lever on the canister, press it, and pull the filter straight out. Check your manual or the canister itself—most have an arrow showing the direction to turn or a label saying "push" or "twist."

Like internal filters, external filters may drip when removed. Place a small container or towel underneath before you start. If water sprays out, the water supply valve behind the fridge should be turned off. Once the old filter is out, inspect the canister opening for any debris or sediment and wipe it clean with a dry cloth before installing the new filter.

Installing the new filter and flushing the system

Before you open the new filter box, check that you have the correct replacement. Your model number and the filter part number must match. KitchenAid filters are not universal—using the wrong filter can damage the system or allow unfiltered water through.

For internal filters: remove the new filter from its packaging and check that the rubber seals on both ends are intact and clean. Insert the filter into the housing with the cap end facing out. Push it in firmly until you hear or feel a click, then turn the cap clockwise by hand until it is snug. Do not over-tighten; hand-tight is sufficient.

For external filters: remove the new filter from its box. If it is a twist-on type, align it with the canister opening and turn clockwise until snug. If it is a slide-in type, insert it into the canister until you hear a click or feel it seat fully.

Once the new filter is installed, run water through the dispenser for 3 to 5 minutes without stopping. This flushes air out of the system and clears any carbon dust from the new filter. The water may look slightly cloudy or taste odd at first—this is normal and will clear after a minute or two. If no water comes out, see the troubleshooting section below.

When to replace your filter and what to buy

KitchenAid recommends changing the filter every six months if you use the water dispenser regularly. If you have hard water or high sediment in your supply, you may need to change it more often—every three to four months. Signs that a filter needs replacement include slower water flow, ice that tastes or smells off, or visible discoloration in the water.

Replacement filters are sold under the KitchenAid brand and by third-party manufacturers. Genuine KitchenAid filters cost between $40 and $60 depending on the model. Third-party filters often cost $25 to $40 and work in most models, though KitchenAid does not officially endorse them. Check the part number on your old filter or your manual to order the correct replacement. Filters are sold at appliance stores, big-box retailers, and online marketplaces.

Troubleshooting: no water after filter replacement

If water does not flow after you install a new filter, the most common cause is an air lock in the line. Run the dispenser for another 2 to 3 minutes without stopping. Air bubbles can block flow temporarily, and continuous running usually clears them. If water still does not come out, turn off the dispenser and wait 10 minutes, then try again.

The second most common cause is a filter installed backward. Some filters have a flow direction marked with an arrow on the cartridge. If you installed it backward, water cannot pass through. Remove the filter, check for a directional arrow, and reinstall it the correct way. For internal filters, make sure the cap is fully seated and turned clockwise until snug—a loose cap can prevent water from flowing.

If water flows but tastes bad or smells like plastic, the filter may not have been flushed long enough. Run the dispenser for another 5 minutes. If the problem persists after 10 minutes of continuous flushing, the filter itself may be defective. Contact KitchenAid customer service or return the filter to the retailer for a replacement.

Frequently Asked Questions

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

Third-party filters work in most KitchenAid models if the part number matches, and they are usually cheaper. However, KitchenAid does not officially support them, so if something goes wrong, the company may not help troubleshoot. Check the part number carefully—using the wrong filter can damage the system or allow unfiltered water through.

What happens if I do not replace the filter regularly?

A clogged filter slows water flow and reduces the effectiveness of filtration. Sediment and chlorine bypass the filter and reach your ice maker and water dispenser, affecting taste and potentially damaging the ice maker over time. Replacing the filter every six months prevents this and keeps your water tasting fresh.

Do I need to turn off the water supply before replacing the filter?

No, not usually. A small amount of water may drip when you remove the old filter, but turning off the supply is only necessary if water sprays out or continues to flow after removal. If you are uncomfortable with any dripping, you can shut off the valve behind the refrigerator before you start—it is a straightforward precaution.

Why is my water cloudy after I install a new filter?

New filters release fine carbon particles during the first use. Run water through the dispenser for 3 to 5 minutes continuously to flush these particles out. The water should clear after a minute or two. If it remains cloudy after 10 minutes of flushing, the filter may be defective.

How do I know which filter part number I need?

Check the old filter cartridge itself—the part number is printed on the plastic housing. You can also find it in your refrigerator manual or by searching your model number on KitchenAid's website. Write down the full part number before you order a replacement to make sure you get the correct one.