A technician will diagnose the issue, beginning with a visual inspection and temperature check. Common repairs include replacing faulty thermostats, defrost timers, or clogged drain lines. For cooling problems, they may need to evacuate and recharge the refrigerant after fixing leaks. If the compressor has failed, it is a more complex and costly replacement. The repair concludes with testing all components to ensure the fridge maintains the correct temperature and functions safely, restoring optimal performance.