I’m having the exact same problem. Three year old system. Unplugged the rain sensor and connections looked fine. Still same problem. Anybody have any other ideas?
Hi,
I am pretty sure that moisture is the problem. After dismantling the board I saw moisture inside the ISS housing. I took the board, which also spontaneously indicated the precipitation without the tipping bucket connected, out of the ISS and took it inside the house without battery and let it discharge. ( let it dry) After a few days I reinstalled the battery and connected the tipping bucket to the board and connected it to the console. It works fine and after a tilt of the tipping bucket, the precipitation shows as it should. I tested a lot. Now I have mounted and connected the board outside again in the ISS. Of course, as a test, I packed the housing in plastic to exclude moisture. It now works 2 days as it should and it rains and the precipitation is measured nicely.
So, see if you see moisture in the ISS housing. In my opinion, moisture is really the cause.
I hope it helps you.
Brgds,
Oebel