Yes, things are happening this morning. I woke to a cooler-than-normal house, and one look at the setting vs temperature differential on the thermostats told me what I needed to know. It was confirmed when I went to the basement and found a blinking red reset switch on the furnace. I pressed the reset button and it started up, but five minutes later it stopped. Tried one more time to confirm it was not going to stay on, and called the People. Fortunately, I have an annual service contract and they'll be out this afternoon to fix it. We've been through this before, maybe a couple of times in the past 25 or so years, and I guess it was time for another new starter, or whatever it is they actually replace.
(Also fortunately, we're out of the dead of winter, even if we're still having these weird cold spells. The house is 60+ and I'll be fine in warm-ish clothing till they get here.)