My Nest shows E44 error (no power, red wire required), the Technical info > power shows:
- Battery 3.858V
- Voc 35.40V
- Vin 35.40V
- Lin 8 mA
Connected to internet, I can see it in the nest app with ERROR status (E44: Contact Nest Support). I can see Technical info in the app: Model Display-4.9, serial, updated April 21, 2022, software 6.2-27, ip address, but when I check the Equipment > base it says Model unknown and serial number unknown.
Tried rebooting a few times, no help. Checked the voltage on the wires, get 26 AC between R and W1. Moved the wires around - they are connected nicely. Not sure what else I could try - this happened around May I guess, I didn't need heat already so kind of forgot about it and now when heating would be nice, got back to the problem and can't solve it.
After some more fiddling and rebooting I got this to the point where the app says "Error, power out E194: Connect R Wire" and it now shows base information with serial number and everything, but still complaining about the R wire.
Some updates:
- unscrewed the base looking for busted fuses or anything else weird, all two fuses that looks like fuses (F3 and F4) have continuity and look fine.
- when I connect a "good" thermostat to the "bad" base, it will also complain about the wire, when when I connect the "bad" head to the "good" base everything works
- when I connect a good base to the same wires in the office, everything works great
so it is the base, how can I try to fix it?
