Oliver, I had a similar problem with the boat speed reading and changed the sensors (not an easy thing to do) Unfortunately the reading was still 0. I then open the box and cleaned the contacts between the different components and it came back to life. It is possible that that was the original problem but I had already changed the sensors. As for the wind speed indicator, I have some times a problem with it but it usually comes back after I do a system test. Clearly, age has its consequences.
