How long does a central air conditioner last?

A well-maintained central air conditioner typically lasts 15-20 years in Ottawa's climate, though this can vary significantly based on usage, maintenance, and equipment quality.

Several factors influence your AC's lifespan. Higher-end units with quality components often reach the 20-year mark, while budget models may need replacement after 12-15 years. Ottawa's relatively short but intense cooling season (roughly May through September) is actually easier on equipment than year-round use in warmer climates. However, our temperature swings and humidity levels still create wear on components over time.

Proper maintenance is crucial for maximizing lifespan. Annual professional tune-ups, regular filter changes, and keeping the outdoor unit clean can add 3-5 years to your system's life. Neglected systems often fail prematurely due to dirty coils, refrigerant leaks, or compressor damage that could have been prevented.

Watch for these signs that replacement may be approaching: your AC needs frequent repairs (especially if repair costs exceed $1,000 annually), struggles to cool your home effectively, or your energy bills have increased significantly. Units over 15 years old using R-22 refrigerant (being phased out) become expensive to service and are good candidates for replacement.

In Ottawa's market, budget $3,500-$5,500 for central AC replacement, depending on your home's size and the efficiency level you choose. Higher SEER ratings cost more upfront but save money over the system's lifetime through reduced energy consumption.

If your AC is approaching 15 years old or showing signs of decline, it's wise to have it inspected by a licensed technician who can assess its remaining life and help you plan for eventual replacement.

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