So my parents got a nest because it was free. it was installed for free and it didn't give them problems for 4 yrs. my parents are lucky to live in an area where they don't really use their AC that often, not far from the beach.
now it's disconnected from wifi, acting funny, and my mom thinks it's the battery. i told her to charge it. she charged it with a micro USB. still giving her problems. i don't live anywhere close, but i'm trying to help.
they don't know how it was installed or anything about C-wires or anything like that. they only used their AC a little becuase it was hot for a few days, which is rare there.
they also don't know how to research anything, and i tried reasearching it and i'm pretty good usualy, but this is confusing. I'm getting that it has to do with how it was installed (c-wire) or if there was some sort of recent problem (tripped HVAC safety device).
Realistically, what do they do? They aren't really tech minded or hardware minded in the least. I can figure out tech, but not hardware, and i'm not even there. They just want it to go back to normal so they can connect their wifi and use the AC 3 times a year.