And recently the battery has indeed been staying at the 3.9v target as expected. It took a while to reach that target though. After topping it off to 3.7v again, and adding the blue common wire hack described in the link at the top of the thread, over a couple of days its voltage slowly crept up to 3.9v and now seems to be staying there again. I have no idea if the blue wire hack had anything to do with the voltage going back up or not.



I think it was, but my memory isn't the best right now. 37 point something, I think, but I don't remember the point something part. I'm in Hawaii for a week now, so I can't check. Too bad that's not one of the pieces of data I can view in the "Technical Info" screen remotely. :-)

The online troubleshooting wizard at Nest.com didn't seem to complain that it was too high when I went through it. The wizard basically said "Voc looks good, you've solved your problem" while of course the unit kept shutting off its wifi.

By the way, it looks like you guys did some kind of a trick with the numbers to the right of the decimal point there. I couldn't just type any random digits past the decimal point into the online troubleshooting wizard, or it would tell me the entry was invalid. So it appears one of those digits wasn't actually a voltage, but rather some kind of checksum or shibboleth. Very clever, guys. :-)




Nothing changed with the furnace that I know of, other than, the weather turned colder so the furnace was running more often.

Maybe the whole thing was just that the wires needed a bit of reseating, and all of my fiddling took care of that?



:-)