The water dispenser and ice cube maker stopped working
Your water line could be frozen in the door. You can disconnect the line under the unit before it goes into the door at the bottom hinge. Push the dispenser button and see if it comes out there. If it does leave the door open till it thaws. Covering the opening with a blanket will prevent the loss of cold in the freezer. . GE makes a heater that will prevent this from happening again. The part number for this heater is WR49X10173.
disconnect the line to the water dispenser at the water inlet valve on the back where the water supply comes in and try the dispenser. if you hear the valve work but water doesn't come out, the valve is bad. If you don't hear the valve, the dispenser switch is bad
Try swapping the wires on the dual water inlet valve. It’s on the back where the water supply comes in. Then try the water dispenser. The water should go to the ice maker. This will tell you weather or not the ice maker valve is working and if the line is clear.
The water inlet valve on the back of unit opens when the ice maker needs water. If the valve doesn't seal good because of sediment or wear it will continue to drip and when the water reaches the ice maker supply tube it will freeze blocking the fill tube.. You can take the water line off the valve and watch to see if it drips.
A strainer before the inlet valve can also get stopped up restricting flow.