Our 2812 thermo-hygro sensor did the same thing. The humidity was stuck at 1% for a long time, except for a couple hours in the middle of the day. That, unfortunately, deteriorated into no temp or humidity displayed on the console, although the sensor still seemed to relay the wind / rainfall data. This past weekend I opened up the sensor and cleaned everything with alcohol and a toothbrush, but no luck.
I've been checking Costco weekly for a new cheap weather station, but was also looking to get a "real" weather station (Davis Vantage Vue). Then, to my surprise, Costco had the La Crosse C84612 for ~$80 yesterday. It doesn't come with a USB stick, but instead comes with their internet gateway.
I bought it regardless, and was very happy to find that it uses exactly the same sensors as the 2812. I used the new thermo-hygro sensor, paired it with my existing old sensors and old 2812 console, and everything was back up and running and posting data to Weather Underground. I also paired the new console to the sensors, so we now have a second console in our bedroom, and I have a spare rainfall and wind sensor. Not too bad for $80.
I haven't really unpacked the rest of the box yet. It would interesting to see if somebody is able to hack the internet gateway, although my brief Googling hasn't shown much promise yet. Maybe if I'm bored over the winter months I can take a crack at it.
