The average operational lifespan of a residential central air conditioner is 10 to 15 years, though exceptionally well-maintained systems in moderate climates can occasionally reach 20 years. System longevity depends heavily on local operating conditions, compressor workload, annual maintenance, keeping clean air filters, and maintaining proper refrigerant charges. Over years of continuous summer operation, normal wear and tear eventually degrades electrical contactors, fan motors, and compressor windings, necessitating replacement. Verification: Monitor repair frequency and energy bills as your system approaches its tenth year of service.
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