Is your mast head unit the original B&G 213?
If so, it is very unlikely that the problem is at the top of the mast because the wind speed and direction are independently generated and transmitted. It is POSSIBLE a bad ground or power connection is the issue at the top of the mast, but there is a lot to check before you climb up there.
Here are a couple of good resources for troubleshooting:
Waiting for the tattered remnants of Philippe to pass by before heading south.
---In amelyachtowners@..., <jgermain@...> wrote :
I'm not receiving wind speed or direction from my mast head unit. The ITC 5 is online and seems to work OK.
Is it likely the head unit is fubar?
Thank you for the help as you may imagine...
Eleuthera, SM 007