The UltraWF filter twists out by hand — no tools needed

The Frigidaire UltraWF is a push-in cartridge filter that screws into the water supply line inside your refrigerator. To replace it, you locate the filter housing (usually on the back wall or bottom of the fridge), twist the old cartridge counterclockwise until it stops, pull it straight out, and screw in the new one clockwise until snug. The whole job takes about five minutes and requires no tools.

The filter sits behind a plastic cover or access panel on the interior wall of your fridge. Some models have the cover labeled "Water Filter" or "Filter"; others require you to look for a cylindrical plastic housing about the size of a soda can. Once you find it, the replacement is straightforward mechanical work.

Key Takeaways

  • Locate the filter housing on the back wall or bottom interior of your Frigidaire refrigerator, usually behind a removable cover.
  • Turn the old filter counterclockwise by hand until it stops, then pull it straight out of the housing.
  • Flush the new filter by running water through the dispenser for 3 to 5 minutes before drinking to clear air and loose carbon.
  • Replace the filter every six months or when water flow slows, whichever comes first.
  • Keep the model number of your fridge handy when buying a replacement to may support you get the correct UltraWF cartridge.

Finding the filter housing in your Frigidaire

The location varies by model. In most side-by-side refrigerators, the filter sits on the back wall of the fridge compartment, usually in the lower right corner behind a plastic cover. In French-door models, it is often on the bottom of the fridge interior, accessible by removing a small panel. Some older Frigidaire models place it on the exterior back wall, but UltraWF filters are almost always inside.

If you cannot find it by looking, check the model number on the back of your fridge or inside the door jamb, then search the Frigidaire website or your owner's manual for "water filter location." The manual will show you exactly where it is and confirm that your model uses the UltraWF cartridge.

Removing the old filter step by step

Once you have located the housing, grip the filter cartridge firmly with your hand. Turn it counterclockwise — the same direction you would unscrew a jar lid. You will feel resistance at first; keep turning until the cartridge stops. Do not force it past that point.

Pull the cartridge straight out toward you. Some water may drip from the housing or the cartridge itself, so have a small towel or cup ready. If the cartridge is stuck, wrap a dry cloth around it for better grip and try again. Do not use pliers or a wrench, as they can crack the plastic housing.

Once the old filter is out, look inside the housing. You should see a small rubber O-ring seal at the base. If it is still attached to the housing, leave it there. If it came out with the old cartridge, remove it and set it aside — you will need it for the new filter.

Installing the new UltraWF filter

Before you install the new cartridge, check that the rubber O-ring is in place inside the housing. If it is missing, take the O-ring from the old cartridge (if it came out) and press it firmly into the groove at the base of the housing. This seal is critical — without it, water will leak around the filter.

Insert the new cartridge into the housing and turn it clockwise by hand until you feel it catch. Continue turning until it is snug — you should feel a slight resistance, but do not overtighten. A quarter-turn past snug is usually right. If you turn too hard, you risk cracking the housing or the cartridge.

Replace any cover or access panel you removed. Your filter is now installed.

Flushing the new filter before use

New filters contain loose carbon particles and air. If you drink water when ready, it may taste bitter or look cloudy. To clear this, run water through the dispenser for 3 to 5 minutes straight. You can catch this water in a pitcher and use it for plants or cleaning — it is safe, just not ideal for drinking yet.

After flushing, the water should run clear and taste normal. If it still tastes off after 10 minutes of flushing, check that the cartridge is screwed in fully and that the O-ring is seated properly. A loose connection or missing seal can allow unfiltered water to bypass the cartridge.

When to replace your UltraWF filter

Frigidaire recommends replacing the UltraWF every six months under normal use. If you have hard water, high sediment, or a large household, you may need to replace it sooner. The first sign is slower water flow — if the dispenser takes noticeably longer to fill a glass, the filter is clogged and should be replaced.

Some Frigidaire models have a filter indicator light on the control panel that turns red or blue when replacement is due. Check your owner's manual to see if yours has one. Even if the light has not come on, replace the filter at six months to maintain water quality and flow rate.

Troubleshooting common problems

If water leaks from the housing after you install the new filter, the O-ring is likely not seated properly. Turn off the water supply to the fridge, remove the cartridge, and check that the rubber ring is fully pressed into the groove at the base of the housing. Reinstall the cartridge and try again.

If the water still tastes bad after flushing for several minutes, the old filter may have left debris in the line. Turn off the water supply, remove the new cartridge, and run water through the housing into a bucket for 30 seconds to clear any loose particles. Reinstall the cartridge and flush again.

If the cartridge will not turn or feels stuck, do not force it. Turn it back clockwise to loosen it slightly, then try counterclockwise again with a steady, even pressure. If it remains stuck, the housing threads may be damaged — contact Frigidaire support or a repair technician.

Frequently Asked Questions

Can I use a different brand of filter instead of the UltraWF?

Some third-party filters are designed to fit the UltraWF housing, but they may not filter as effectively or fit as securely. Frigidaire UltraWF cartridges are engineered for your specific model and housing. Using a non-OEM filter can void your warranty and may result in leaks or poor water quality.

What do I do with the old filter after I remove it?

Most water filters contain carbon and should not go in the trash. Check your local recycling program — many accept water filters at drop-off centers or through mail-back programs. Some retailers that sell replacement filters also accept old ones for recycling. Call ahead to confirm.

How much does a replacement UltraWF filter cost?

Frigidaire UltraWF filters typically cost between $25 and $50 depending on where you buy them and whether you purchase a single filter or a multi-pack. Buying a two-pack or three-pack usually costs less per filter than buying one at a time. Check the Frigidaire website, Amazon, or appliance retailers for current pricing.

Will the fridge shut off water if the filter is not installed?

No. If you remove the filter and do not replace it, water will flow directly through the housing without filtration. This is safe in the short term but defeats the purpose of the filter. Always install a new filter before using the water dispenser again.

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

No. The UltraWF cartridge has an internal valve that stops water flow when you remove it. You may see a small amount of water drip from the housing, but the supply will not run continuously. If you are uncomfortable with any dripping, you can shut off the water valve behind the fridge before starting, but it is not necessary.