Hello Katharine, I'm sorry you are having this problem with the water line freezing. Unfortunately, the model number listed is not showing to be a valid model and I cannot access any information. I can only provide some general information. In most cases, this problem will indicate the water valve is not seating all the way and allowing water to seep through, which will cause this problem. In this case, the water valve would need to be replaced. Some models will have a small heater attached to the water tube and if it fails could also cause this problem. In this case, the problem could be with the main control board or it could be a failed heater, which would not be repairable. If you would like more specific information, please recheck to verify the model number and we will be glad to assist you further. If you would like to have this checked by a technician, you can call 1-800-469-4663 to schedule a tech to come out. I hope this will help you.