The average operational lifespan of an indoor evaporator coil or outdoor condenser coil is 10 to 15 years, matching the typical lifespan of the overall HVAC system. Coil longevity depends heavily on routine maintenance, such as keeping air filters clean, scheduling annual professional cleanings, and protecting the metal fins from corrosive environments. Over years of service, microscopic pinhole leaks can develop in copper tubing due to formicary corrosion, eventually requiring coil replacement or a complete system upgrade. Verification: Monitor system efficiency and check for recurring refrigerant leaks as your unit reaches its tenth year.
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