So I took the electrical panel off my heat pump, and all I could find was wires. I quickly realized I was out of my league, since they’re all the same color, and there are no diagrams, and I can’t spot the relay. I suck at life.
So I put the thing back together, and gave it a good shove, and it turned on again. Maybe there’s some sort of thing that’s loose, or there’s a leveling/offset requirement, and after 20 years it’s settled a bit skewed? I’ll go out there with a level and my kicking boots next time it shuts off.