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Water Filter for the Frigidaire LGUB2642LF4 (ULTRAWF)
✓ 100% compatible — no bypass plug needed
🔧 5-min push-in swap
🇺🇸 Ships from Indiana
Every cartridge that fits this model — pulled live from the catalogue:
✓
LGUB2642LF4 specifics — where the filter actually lives
On the LGUB2642LF4, the cartridge in the fresh-food compartment — exact spot varies by dispenser layout, a deliberate placement that keeps the swap away from the door seals and drawer rails. The seat is a twist-in design — a quarter turn one way to release, the other to seat, and the only tool you need is a towel for the drip.
Two quirks worth knowing before you order: a stubborn first twist when the old o-ring has set, and a change-filter light that will not clear itself until you hold the reset. The constant across every trim of this machine is the cartridge line — the ULTRAWF media line; that is the anchor every compatible listing hangs from. Finish codes such as F4 change the look, not the plumbing — order the cartridge by model, ignore the finish letter.
Reading the LGUB2642LF4 model code — what the digits tell you
Capacity 26 cu ft: a mid-to-full-size cabinet whose dispenser traffic sets the realistic change cadence. Hold this constant while shopping: model-code suffixes track cosmetics; the ULTRAWF fit is invariant across them.
Swap it in 5 minutes
- Twist the old cartridge a quarter turn counterclockwise and pull it straight down — keep a towel in reach for the dribble.
- Fill the new cartridge with cold tap water so the chamber is not fighting an air pocket.
- Offer the new cartridge to the bay, push up, and twist a quarter turn clockwise until the stop catches.
- Run two gallons through the dispenser to flush carbon fines, then hold the filter-reset control until the status light clears.
What this filter takes out of your water
| What it targets | Standard that covers it |
|---|---|
| Chlorine taste & odor | NSF/ANSI 42 — aesthetic effects |
| Particulates, Class I | NSF/ANSI 42 — fine sediment |
| Lead | NSF/ANSI 53 — health effects |
| Cysts (cryptosporidium, giardia) | NSF/ANSI 53 — microbial |
| PFOA & PFOS | NSF/ANSI 53 (P473) — varies by cartridge |
Coverage above lists what the standard addresses, not a performance claim for any specific cartridge — removal claims vary by certificate, so check the NSF listing for the exact part number you are buying.
LGUB2642LF4 filter questions
How do I reset the filter light on the Frigidaire LGUB2642LF4?
Press and hold the reset control until the light clears (a few seconds), with the new cartridge already seated — the LGUB2642LF4 owner’s manual lists the button location for your control panel.
Will the Frigidaire LGUB2642LF4 dispense water without a filter cartridge?
Nothing to buy — the ULTRAWF housing closes without a cartridge; water runs unfiltered until the next one goes in.
Are off-brand filters safe for a Frigidaire refrigerator?
Certified aftermarket cartridges are built to the same NSF test standards as the OEM part, and federal warranty law (Magnuson-Moss) protects your coverage when you use them.
Why is the OEM ULTRAWF cartridge so much more expensive?
Part of the OEM price is the badge and the distribution chain. Certified alternatives meet the same test standards at a lower unit price, especially in multi-packs.
How often should I replace the filter in my LGUB2642LF4?
Every six months or at the rated gallon capacity, whichever comes first — the ULTRAWF class cartridges all share that service interval.
Do I need to turn off the water supply to change it?
No — the bay is designed for a live swap. Expect a small dribble, keep a towel in reach, and flush a couple of gallons through the new cartridge before the first glass.
Every filter that fits your fridge
This bay takes the OEM ULTRAWF. ClearFit verified-fit alternatives for this exact slot are being staged — every compatible option for your fridge is one lookup away.
Check every filter that fits →This filter expires six months from today
Your HVAC filter is probably on a different cycle. Track them all in one place.
months until this filter should be replaced (200-gal rated life)
Free tool · tracks fridge + HVAC + whole-house · auto-refill optional
More models using this filter
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