Bought a model 00615 weather station on Black friday sale 2017. Outside temperature is constantly freezing up. The first time it happen I had sensor about 100 feet away and thought that was the problem so tried a different channel and reset it. Worked for a few days and temp stuck again (not on the same temp). I moved the sensor about 30 ft. away. Again after just a few days the outside temp would stick. I've changed batteries in both units, synced it up as directed many times and tried all 3 channels. The sensor is 30 ft away with only a window in between yet I can only get a few days before it locks up and it's never been the same temp that it locks up on.