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How long should my AC unit last?

By Fahrenheit AC /

However old your living space may be, it’s a good idea to know approximately how long your AC unit should last. In states where it is hot most of the year, such as in Florida, we know how important it is to have a well-running AC unit.

AC Unit

What is the average lifespan of an AC unit?

All ventilation, heating, and air conditioning systems require regular maintenance and care to be at its most efficient level. For AC units, 10-15 years is the average lifespan, given the best-case scenario. Living near salt water affects the lifespan, reducing it to 4-7 years. However, proper care and maintenance can prolong the lifespan and keep your AC unit running efficiently.

How do you know if the AC unit is close to expiration?

  • Age is one way. If it’s at the 10-15-year mark, you can expect to have to change it soon. If you’re unsure of the age of your AC unit, you can always look for the serial number and call the manufacturer to find out.


  • The efficiency of the coils is also key in the life of the AC unit. If your evaporator coil is not keeping humidity levels down, you may be looking to replace the AC unit soon. As the AC unit becomes older, it won’t operate at its normal standards. If you find the air in your home to feel more humid and not as cool, you may want to have a professional look at your AC unit. If you see freezing or mold in your coils, this also indicates the old age of the AC unit and that it’s time to start considering replacing the unit.


  • High utility bills can also indicate your AC unit is close to the end of its life. If you’ve already investigated and done what you can on your end to save costs, but they keep rising, then the answer is most likely that your AC unit is old and may need to be replaced soon.


Always maintain a routine to provide care for your AC unit. This involves changing the filter when you’re supposed to and scheduling annual checkups. The proper care can prolong the life of your AC unit and avoid costly repairs.

Not sure if you’re on the verge of needing to replace your AC unit or not? Call a reputable AC company with experienced technicians that can help evaluate the health of your AC unit.