Have been having a problem with my wind indicator.

The direction arrow works fine and the rotating "cup" at  the top of the mast spins, so I get the wind arrow pointer working on the gauge but the wind speed reads "0".I found by pressing the top right button on the gauge  will get a wind reading for about5-6 seconds, then the reading jumps back to "0".

Any suggestions as to what might be causing this?

Thanks for any suggestions!

Chuck Parker
Artlantic Highlands, NJ