Google Nest Community

And FYI- my furnace is a Goodman (Amana) GPK14.

My problem was solved. See above!

So this wasn't a Nest problem, but a heater problem. It was wired for "low heating" mode, meaning it drew less power but was less effective and thus would run for hours overnight, then shut down for a "time out" for a few more hours. Service pro rese...

Same here. It eventually blows heat as usual, but only after 2-3 hours of *thinking* it's doing it.