How Long Should an Air Conditioner Last?
September 15, 2022
Is that strange buzzing noise you hear the final death rattle of your AC unit? It seems like you just moved into your house a few years ago, and it was nearly new then. Is it really time to buy a new HVAC system? How long should an air conditioner last?
When is It Time for New AC?
The answer to the question “how long should an air conditioner last?” depends on several factors. Many manufacturers and AC repair companies will tell you that an air conditioner will last from 10 to 15 years.
However, the U.S. Department of Energy states that your air conditioner should last from 15 to 20 years, basing it on the ease of finding replacement parts and service.
A well-maintained air conditioner could continue to function for 30 years. However, it will eventually become more expensive to run than to replace.
Deciding Whether to Repair or Replace Your AC
A new air conditioner is a big investment, but the energy savings of a new unit could make a difference to your monthly budget. Or, you may have to get another couple of years out of the existing unit because you need to invest your home improvement budget in other areas.
Finding the critical point when your old AC costs you more than buying a new one will depend on your priorities and budget. A handy homeowner may be content to maintain the existing system by regular service.
Another homeowner may decide to purchase a new system and take advantage of technological advances that improve energy efficiency. You’ll need to calculate the return on the investment to see when it will pay for itself.
The most critical factor affecting AC lifespan
The main factor in how many years your AC lasts is the frequency of use. An old AC unit may not be important to a family in Vermont if it works the few days a year it’s needed. In fact, if they rarely use it at all, it may run like a champ for decades with simple maintenance.
Texans may feel differently. Those who live in hot or humid climates put more hours on the equipment, which naturally shortens its lifespan. And if it’s not regularly maintained, that lifespan is even shorter.
Signs That Your AC Needs to Be Replaced
You want to be absolutely sure you need to replace it. There are a few signs that the clock is ticking on your old unit:
Electric bill surges
Energy costs are up all over the country, so it may be hard to know if the increase in usage is solely the fault of your AC. If it’s over 15 years old, however, it’s probably the main culprit.
Doesn’t hit set temperatures
As long as your thermostat settings are reasonable for the climate and weather, your AC should be able to reach the temperature setting. If it never does, no matter how long it runs, it may be time to pull the plug.
Frequent breakdowns
How much are you spending on repairs to keep your AC running? Even if you do the work yourself, the cost of your time can add up. Remember that a new unit is sure to lower your electric bill immediately.
How to Extend the Life of Your AC
If you’re not quite ready to start shopping, you’ll want to know how to improve your air conditioner’s performance. You’ll certainly want to ensure it lasts a few more years.
Since the critical factor for AC lifespan is usage, you should reduce the load on the equipment. That could mean raising the thermostat in the summer or actively reducing the amount of heat it needs to remove.
Mindful AC use could even help you lower your energy bill, so you’ll have a more generous budget when it’s time to replace the equipment.
Here are a few ideas that can help:
Replace air filters regularly
Check ductwork for leaks
Use a programmable thermostat to better control usage
Clean evaporator coils on your indoor unit to make them more efficient
Limit the use of heat-generating appliances, such as ovens, stoves, and clothes dryers
Turn off heat-producing electronics when not in use.
Switch to LED bulbs, which do not add to the heat load
Use fans to cool off at a higher thermostat setting.
Have your AC unit serviced professionally at least once a year