Despite High Repair Costs, Sealed-System Failures Drive 35 to 40 Percent of Refrigerator Expenses

https://blogfreely.net/beliasmptu/unplugging-saves-money-before-damage-spreads-to-your-home-electrical-system

The compressor is the most expensive refrigerator component to repair or replace, with sealed-system failures running $1,200 to $2,500 depending on unit age and rated capacity