The Jeep had virtually no heat.
Like last year, as long as I don't run the thing on high, I get warm-ish air from the vents, but nothing like what it should be. The air coming from the vents should be hot and it isn't.
This means, of course, that I am going to have to undertake the now-annual ritual of flushing the Jeep's heater core. I'm also going to have to find out how to flush the entire cooling system, though I am not optimistic that I'll be able to get it clear of whatever guck is clogging up my heater core. I suspect that the only true way to fix this is to pull the engine, yank out the freeze plugs, and hose the water jacket out with a pressure washer.
Since I am not going to do that any time soon, I'll have to look into flushing the entire cooling system and hope that will fix the problem. I am tired of doing this.