How Long Should an Air Conditioner Last?
Most residential air conditioners give ten to fifteen years of service. Coastal installations in San Diego County often land at the lower end because salt air corrodes outdoor equipment, and systems that were oversized or never maintained land lower still. Maintenance, correct sizing and good airflow are what move a system toward the top of that range.
What shortens a system's life
- No maintenance, so coils foul and the system runs hot for years
- Oversizing, which short cycles the compressor — compressors wear on starts
- Restricted airflow from filters, crushed ducts or missing returns
- Salt air on coastal installations
- Refrigerant leaks left topped up rather than repaired
- Repeated breaker trips reset without diagnosis
Signs the end is near
- Two or more service calls in a single season
- Rising bills with no change in how you use the house
- Rooms that never reach setpoint on hot afternoons the way they used to
- A refrigerant leak on an older system, particularly in a coil
- Parts availability becoming an issue for the model
Planning beats reacting
A system replaced on your schedule is a different experience from one replaced during the first heat wave, when availability is tight and you are making a large decision quickly. If yours is past twelve years and starting to show the signs above, it is worth getting a free estimate before you need one.
What a replacement carries
Our systems start as low as $7,995 and carry a 10-year parts and 10-year labour warranty along with our Lifetime Workmanship Guarantee on the installation itself.
Common questions
How long do air conditioners last?
Most residential systems last ten to fifteen years. Coastal installations often reach the lower end because salt air corrodes outdoor equipment.
What makes an AC wear out faster?
Skipped maintenance, oversizing that causes short cycling, restricted airflow, salt air, and refrigerant leaks that are topped up instead of repaired.
When should I start planning a replacement?
Past about twelve years, particularly with repeat service calls, rising bills, or a refrigerant leak. Planning ahead avoids deciding quickly during a heat wave.
Reviewed by Briton Davis, owner, and the Cool Guys Home Services service team · Licensed, bonded & insured (CSLB #1156890)
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