Repair or Replace an Aging AC Unit? A Technician's Decision Guide

Rule-of-thumb screens include compressor failures on units older than twelve years, repeated leaks after multiple flare reworks, and coil corrosion that pins technicians every season. When repair estimates exceed forty percent of a premium replacement quote—and efficiency gains exceed two seasonal efficiency steps—the economic crossover often favors replacement if you plan to stay five or more years. Regulatory transitions away from high-GWP refrigerants may limit future recharge options for legacy R-22-style platforms still encountered on imported assemblies; confirm spare availability in your city. Document load calculations before upsizing; oversized units short-cycle, dehumidify poorly, and wear contactors faster than properly matched systems.