Is it possible to fix the connectivity module of a sensor?

My Thermo - Hygro RF Clock Sensor (RTGN318) from Oregon Scientific cannot connect to the Weather station.

Normally the weather station displays a specific icon to indicate that the sensor is connected / paired. This icon is not displayed although the sensor was standing right next to the station.

I assume the transmission module of the sensor is out of order as it is the component which remains outdoor and gets exposed to harsch weather conditions. Is there any possibility to test / repair / replace the transmission module of the sensor?