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Buderus GB142 - 9P Error Code?
Got a 9P error code. I swapped out the fuse in the UBA3, and that bought me another day before I got the code again. Tried resetting, and turning off/on again. I found that if I turned it off, removed and then reseated the KIM/UBA3, and that bought me another day. This time, when I did that, and then turned it back on, I heard a loud, fast clicking coming from the unit somewhere, that I've never heard before. That sounded pretty bad, so I turned the unit off. When I turned it back on, there was no indication at all on the screen, and not startup sounds. My gut says that the fuse in the UBA3 blew (had to go to work, haven't checked yet).
My question at this point is, what do you think the root cause is? Something caused the fuse to blow. I can replace the UBA3, but its an expensive part, and I don't want to replace it if something else is likely the issue. And then there's that weird sound at startup.