Beyond the 50 Percent Threshold Lies True Replacement Economics for Failing Units
https://crankmaster2.gumroad.com/p/when-to-call-for-same-day-repair-instead-of-waiting-for-appliance-failure
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