I bought 2 new electric waterers to use this winter. They have been working good till this morning. It was probably close to 0 overnight. When DH went to feed the chickens he found some frozen water in the bottom, said it wasn't froze solid but had to add some hot water to get it thawed. The one in my bigger coop wasn't froze at all. Have any of you had this happen with your heated waterers? Could it have gotten so cold that the thermostat couldn't keep it from freezing. I don't know if it has burned out or not, but I guess I'll know eventually. If it is burned out, that don't say much for the quality of these waterers, as they aren't cheap. I would hate to think I spent that much money for something that didn't even last 1 winter. Any ideas about this?