Beyond the 50 Percent Threshold Lies True Replacement Economics for Failing Units

https://blogfreely.net/beliasmptu/unplugging-saves-money-before-damage-spreads-to-your-home-electrical-system-0ss0

Most refrigerators last 10 to 15 years, but the real replacement decision hinges on the sunk-cost risk of over-repairing past the 50% rule: once repair costs exceed half the price of a new unit, continued repairs expose you to repeat-failure liability