Thanks for the information. It's been 26 hours of functioning correctly.
It's a Goodman GPH1336H41AC all-in-one heatpump package unit for a cabin.
No condenser fan or compressor operation when acting up. Just the air handler fan.
Seems to be one of three things: thermostat, contacter, or transformer.
So I got my multimeter and I'm waiting for it to fail again.