Despite High Repair Costs, Sealed-System Failures Drive 35 to 40 Percent of Refrigerator Expenses
https://telegra.ph/Seven-Year-Refrigerator-Repair-Pays-Off-When-Monthly-Energy-Bills-Drop-Measurably-08-13
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