Fix filter fit issues in Samsung refrigerator

You've just got yourself a new filter for your refrigerator and you take the old one out, but the new one just doesn't want to go in. Relieving the water pressure will help (turn off the water supply and dispense water until it stops). If the new filter refuses to go in, either your new filter or your old filter is not a Samsung brand filter.
Closeup of a Samsung water filter in front of a refrigerator
Closeup of a Samsung water filter in front of a refrigerator

Fix filter fit issues in Samsung refrigerator

Caution
Always use Samsung brand filters. Filters from other manufacturers, even if they indicate compatibility, may damage your fridge and water filter housing, or break off and leave pieces of the filter inside (like the cap), preventing a new filter from being inserted.
Important
A few years ago, the HAF-CU1 model's design was changed from a 2-rib lock to a 3-rib lock in order to provide a tighter fit and better seal. However, the new filter design will still fit in older models of refrigerators, which is why the model and part number was not changed. The first time you switch to the 3-rib type, you may need to perform the "fully unlock the housing" procedure described here, even though the old 2-rib type was also a genuine filter.
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