I have a WMR-968 that is several years old. It has been working great, except for wind speed. I have no way to accurately measure wind speed, but local stations, including the local airport have many times reported winds far higher than what I record. For example, during a recent storm, the airport was reporting 60 mph gusts, and friends with the same weather station were reporting 50 to 60 mph winds. Mine never gets over 24 mph no matter how hard the wind is blowing. My sensor is about 15 feet high on an antenna tower, and is in the clear. Does this just indicate a malfunctioning wind sensor?