We recently moved into a 10 year old home and purchased a new refrigerator with a water filter and ice maker, only to find that when we hooked it up to the single water line behind the fridge, it dispenses hot water. I don't think the line has been used before now and was wondering if anyone has ever heard of something like this where the line is attached to the water heater instead of the cold water line. What will need to be done to fix this?