The solar radiation shield should be cleaned with a hot wet cloth to remove any dust or dirt build up and the Temperature, Humidity and Pressure Sensor Board should be checked for correct operation.
Checking the Temperature, Humidity and Pressure Sensor Board
If any problems are found while checking the Temperature, Humidity and Pressure Sensor Board, the board should be replaced. a temperature, Humidity and Pressure Sensor Board maintainance kit with all parts required and full instructions is available from your Weather-Pro agent.