I can not remove my refrigerayor water filter. Says push to unlock and that does not work. DA29-00012B type filter. Turned water off, tried channel locks(barely grips), tapped with hammer. Stuck with a capital S!
Not sure which refrigerator you have but I found a video replacing those types of filters. It shows that you have to turn the filter to unlock and then it should slide out. Video -> https://www.youtube.com/watch?v=ie4cO5mQYoA