If the Water Filter Is Stuck
First, try to close and reopen the water filter compartment door. Once the door is open, turn off the refrigerator and get rid of some of the water from the water line. Using the water dispenser, dispense the water. This will release the pressure from the water line. After you get rid of some of the water, try removing the water filter.
If this doesn't work, make sure the compartment door is open all the way. Remove the shelf that is located below the water filter compartment, and turn the filter counterclockwise. After you turn the filter counterclockwise – or to the left – pull it gently.