I have had a nest thermostat e for about four years, I installed it in my previous apartment and just moved to a new unit in the same complex. The past four years when heating it would only blow room temperature air, but still heat the apartment just well enough to bring it to the target temperature eventually. I presumed it was just a crappy heating unit, but it wasn't concerning enough to ask the maintenance people to fix it, and I'm lazy and would forget to bring it up in passing.
After moving, and switching the old apartment back to the thermostat it came with, the heat started working again, and now my current place is having the same problem, so it's definitely the nest that is causing it. I'm not sure what to do, I saw a suggestion to switch the O/B setting but that made it actually blow cold air instead of room temp. It's not a dual fuel system as far as I can tell. The wires aren't corroded, they're properly inserted, everything is in the correct spot.
Has anyone run into a situation like this before? I hope I haven't just had a faulty nest for four years and not realized it.
