Besides checking what Mandrake said all I can say is that version 1.4.0 doesn't have issues with rain as that is what I'm using. If you still have problems after flashing 1.4.0 then I suggest you look at other troubleshooting steps. Hopefully the unit didn't ingest water into the wrong place and break by pouring water down the funnel. I would just test by manually tipping the spoon with your finger. Or maybe you have a defective unit. Contact Ambient if the problem persists. Hopefully you are still within warranty period if it turns out to be a hardware failure.
You can get to all the previous firmware versions here:
https://p10.secure.hostingprod.com/@site.ambientweatherstore.com/ssl/ws2000/I would recommend 1.4.0 for now as 1.4.1 has a couple of bugs in SD recording format. (I've reported the bugs and they are working on fix and newer version due soon).
You won't see 1.4.1 in the list. The latest version is simply referred to as
user.bin, so that is 1.4.1 now. If you want to test 1.4.0 then you download it and then rename it to
user.bin or else the WS-2000 will not flash it if it has the wrong name. The WS-2000 only expects a file named exactly
user.bin.* Once the next version comes out in this download directory they will rename
user.bin to be 1.4.1 for archive purposes, and the new version will be called
user.bin.
* The WS-2000 also can use a file named
factory.bin but I recommend sticking to using
user.bin instead. You can rename any archive version of these firmware files to be named
user.bin or
factory.bin. The difference between them is the flashing process a bit different and the original source file is not delete and the WS-2000 doesn't automatically reboot when you use a file named
factory.bin. Using
user.bin is the better (newer) method.