WM918 Temp/Humid Sensor help

[eba1225]

Board,

My Oregon Scientific Temp/Humid sensor died  after 7 years of operation. I was wondering if anybody had a working spare lying around that I could purchase, or if anybody had the schematics for the new WMR968 Temp/Humid sensor.  Am thinking that they are compatible but noticed that the WMR has 6 wires while the WM only has 4. 

Any help in this matter would be greatly appreciated.

Erik