Background: something seemed to be up with my furnace. It was making an incredibly loud noise and shutting off before temp was reached, etc. In case relevant, it's a wall furnace in a very new apartment building. Maintenance ultimately ended up just replacing the entire furnace.
Ever since then, I have an odd problem: the heat will work almost TOO well for a few days. But then the Nest seems to stop accurately sensing the temp; I don't have an external thermometer but it will say it's 74 when it feels way, way colder. This was not an issue before. It also will then suddenly start to say "2+ hour" to heat just a single degree or two. This is also new. It used to always (accurately) say something more like 15 minutes.
I restart it, and then the following happens: The furnace starts up again while the nest is still turning back on. Then the nest immediately reads NUMEROUS degrees colder than it did literally 30 second ago before I restarted it. For example, if it said it was currently "74" in the room before I restarted it, it would now say the current temp was 68.
Any thoughts?? Does it seem like something is wrong with my Nest, or is there any possibility that there is a loose wire? Maintenance insisted that if there was a wiring problem it wouldn't even be turning on and/or making the furnace run at all, but I am not convinced.
I have a medical condition that causes numbness and I live in a very cold climate so it is really, really important for me to have working heat :(. Please help, I don't know what to do.
