I have been bothered with wind recently.

I run La Crosse WS 2350 for a couple of years now .
www.quinn008.euA few days ago I got a false wind spike reading of 178 km /hr and then a few more similar readings. Since then my anemometer has not reported at all just sitting at 0 degrees with no speed.
Physically it is pointing correctly and the cups spinning.
I have done the basics eg battery changes inside and out, cleaned and checked cable fitments, re boot but to no avail !
Taking into account the anemometer is some 30ft up, how can I check if its the anemometer or the THERMO-HYGROMTERIC TRANSMITTER ?
Any help would be appreciated.
Thanks
Jim Q.