Repair Past 50 Percent Replacement Cost Creates Hidden Escalation Risk

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

Replacement timing hinges on the sunk-cost trap: once repair bills exceed half the appliance's replacement price, each additional repair exposes you to repeat-failure liability and escalating repair costs