Looked like 9 and/or 14 on the list below, probably 14.
https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Refrigerator/51-2--/Frigidaire-Refrigerator-Not-Cooling
Got a $17 kit on amazon, and followed this video:
https://www.youtube.com/watch?v=5UgR1wX5XdM
And it seems like the fix worked!
My fridge behavior was as follows:
Every couple of minutes, I would hear a brief buzzing, the compressor got hot, but fridge and freezer were warm.
I verified that both condenser and evaporator fans were running.
😀 🍸 💯
