This refrigerator does not have a water filter. The issue may be caused by the water line in the door getting too cold and freezing. Try taking the toe panel (lower front panel) off, locating the water line that runs through the lower refrigerator door at or in the hinge. There should be a connection at or near this point you may use to disconnect the two ends of the hose. Place the end coming from the refrigerator cabinet into some sort of container and press the water lever. If water comes out the line is frozen or blocked inside the door. If no water comes out it may be the micro switch at the water lever or the inlet valve.
Other causes of no water dispensing:
Water system needs purging.
Dispenser set wrong -Make sure dispenser is set to dispense water and not cubed or crushed ice.
Water pressure to refrigerator is too low, causing water dispenser not to function-A cold water supply with water pressure of 30 to 120 PSI is required to operate the water dispenser. Dispense water in a measuring cup for 5 seconds. It should produce 3 to 6 ounces of water. If less than 3 ounces was dispensed, call a licensed plumber.
Refrigerator or freezer setting too cold.
If you require further assistance please resubmit question with details of the checks you have made. I will be looking forward to helping you again in the near future.