Hey, that definitely sounds frustrating! Since you’ve already checked the capacitor, thermostat, and compressor, one possible culprit could be the ***starter relay*** or ***overload protector*** — these can intermittently fail and cause the fridge to stop and start like that.
Another thing worth checking is ***dirty condenser coils*** — if they’re covered in dust, the fridge can overheat and shut down temporarily. Also, make sure the fridge has ***good ventilation*** and isn’t pushed up too close to the wall.