Our water dispenser on our GE side by side refrigerator quit working. I changed the filter. No results.

At the bottom of the freezer door ( remove the kick plate , 1 screw on each side ) , there will be a water line . Follow this line , about 6 " to a connector . Push in on the white ring and pull out the line , at the same time . Activate the water dispensor pad and see if water flows from the line under the refrig . If it does , then the line in the door is frozen . Either raise the freezer temp for several days , so the line in the door will thaw , or , I have heard using an air tank will blow the ice out of the line in the door . If no water comes from the line under the refrig , while activating the pad , then replace the water valve , behind the refrig , the piece the wall water line connects to on the refrig .
If the water line in door is frozen , GE has a heater kit , pt # WR49X10173 , for this particular problem . It comes , with installation instructions .