At the top of my vision screen it reads temp, but just has a few dots there next to the time. Is there a setting on the 520 that I need to change?, it is paired with my iPhone
You should not need to change anything on the Edge. It should be sending temperature data to the Vision. What you could try doing is toggling the temperature UoM under units to make sure that the value is reset. E.g. change it from C to F and back to C.