Where Your Water Filter Is and Why It Matters

Most refrigerators with ice makers or water dispensers have a water filter that catches sediment, chlorine, and other particles before they reach your glass or ice tray. The filter sits in one of three places: inside the fridge (usually in the upper right corner or back wall), underneath the fridge in a cartridge housing, or behind the kickplate at the bottom front. Check your fridge's manual or look for a cylindrical plastic cartridge about the size of a soda can—that is your filter.

Replacing it is straightforward and takes about five minutes. You do not need tools or special knowledge. The filter itself costs between $20 and $60 depending on your fridge brand, and you should replace it every six months if you use the water dispenser regularly, or every 12 months if you use it less often. A clogged filter makes water flow slowly and can affect ice quality.

Key Takeaways

  • Locate your filter by checking your refrigerator manual or looking for a cylindrical cartridge in the upper corner, under the fridge, or behind the front kickplate.
  • Turn off the water supply to your fridge before you remove the old filter to prevent leaks and pressure buildup.
  • Remove the old filter by twisting it counterclockwise (or pressing a release button, depending on your model) and let any remaining water drain into a bowl.
  • Install the new filter by twisting it clockwise until it stops, then run water through the dispenser for 30 seconds to flush air from the line.
  • Reset the filter indicator light on your fridge's display panel after installation so it tracks the new filter's age correctly.

Step 1: Shut Off the Water Supply

Before you touch the filter, locate the water shut-off valve behind your refrigerator. It is usually a small knob or lever on the water line that runs into the back of the fridge. Turn it clockwise (or flip the lever to the off position) until it stops. This prevents water from spraying out when you remove the old filter and relieves pressure in the line.

If you cannot find a shut-off valve behind the fridge, look under your sink for the main cold-water supply valve and turn that off instead. It is slower but it works. Do not skip this step—water pressure can force water out of the housing when you unscrew the filter.

Step 2: Locate and Access Your Filter

Open your refrigerator and look in the upper right corner or along the back wall for a cylindrical cartridge. If you do not see it there, check underneath the fridge by removing the front kickplate (usually held by two clips or screws at the bottom). Some models hide the filter in a housing mounted to the back wall outside the fridge, accessible from behind.

Once you find it, clear the area around it so you have room to work. Have a small bowl or towel ready—there will be a little water left in the line, and it will drip when you remove the old filter.

Step 3: Remove the Old Filter

Most filters twist out counterclockwise. Grip the filter firmly with both hands and turn it to the left until it stops and comes free. Some models use a push-button release instead—look for a small button on the filter housing and press it while pulling the filter straight out. Either way, let any water drain into your bowl.

If the filter is stuck, wrap a rubber band around it for better grip, or use a filter wrench (a cheap plastic tool sold at hardware stores). Do not force it so hard that you crack the housing. If it truly will not budge, turn the water back on, run the dispenser for a few seconds to relieve pressure, then turn it off again and try once more.

Step 4: Install the New Filter

Before you install the new filter, check the rubber gasket (the ring of rubber around the top or bottom of the cartridge). If it looks dry or cracked, wet it slightly under the tap—a damp gasket seals better. Slide the new filter into the housing and twist it clockwise by hand until it is snug. You should feel slight resistance, but do not overtighten. Most filters click or stop turning when they are seated correctly.

Turn the water shut-off valve back on by turning the knob counterclockwise or flipping the lever to the on position. Wait a few seconds for water to reach the filter.

Step 5: Flush the Line and Reset the Indicator

Open the water dispenser on your fridge door and let water run for 30 seconds. The first water may look cloudy or taste slightly of plastic—that is normal and harmless. It is just air and loose carbon from the new filter. After 30 seconds, the water should run clear and taste normal.

Now reset the filter indicator light on your fridge's display panel. Most fridges have a button labeled "Filter Reset" or "Water Filter Reset" that you hold for three seconds until the light turns off or changes color. Check your manual for the exact location and method—it varies by brand. Resetting the light tells your fridge that you have installed a fresh filter, so it can track when the next replacement is due.

Common Mistakes to Avoid

Do not forget to turn the water back on after you install the new filter. It sounds obvious, but it happens—you will notice when you try to get a glass of water and nothing comes out. Do not overtighten the new filter. Hand-tight is enough; forcing it can crack the housing or damage the gasket and cause leaks later.

Do not skip the 30-second flush. Running water through a new filter removes air pockets and loose particles, so your ice and water taste better right away. Do not ignore the filter indicator light. When it turns on or changes color, that is your signal to order a replacement—waiting too long lets sediment and chlorine build up, which slows water flow and can affect your ice maker.

Frequently Asked Questions

What if water leaks from under the fridge after I replace the filter?

The gasket on the new filter may not be seated properly. Turn off the water, remove the filter, and check that the rubber ring is clean and not cracked. Wet it slightly and reinstall the filter, making sure it twists all the way until it stops. If it still leaks, the housing itself may be cracked—contact your fridge manufacturer for a replacement housing.

Can I use a generic filter instead of the brand-name one?

Yes. Third-party filters work in most fridges and cost less than brand-name cartridges. Make sure you buy the correct model number for your fridge—filters are not universal. Check your manual or the old filter for the part number before you order.

How do I know when to replace the filter if my fridge does not have an indicator light?

Replace it every six months if you use the water dispenser daily, or every 12 months if you use it occasionally. If your water starts to taste off or flow slows down, that is also a sign the filter is clogged and needs replacing. Write the replacement date on a piece of tape and stick it to the fridge as a reminder.

What should I do with the old filter?

Most water filters can go in the recycling bin if your local program accepts plastic cartridges—check your municipality's rules. Some retailers that sell replacement filters also take old ones back for recycling. Do not pour the old filter down the drain or throw it in the trash if recycling is an option.

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

The new filter releases tiny air bubbles and loose carbon particles into the water line. This is normal. Run the dispenser for 30 to 60 seconds and the water will clear. If it stays cloudy after a few minutes, turn off the water, remove the filter, and make sure it is twisted all the way in and seated correctly.