How Long Do Air Conditioners Last?

Wondering how long your air conditioner will last? You’re not alone. Whether you're looking to buy a new unit or trying to squeeze a few more summers out of your current system, knowing the typical lifespan of an air conditioner can help you plan ahead.

Just like any hardworking appliance, air conditioners don’t last forever − but with the right care, they can serve you well for many years. The type of system you have, how often it’s used and how well it’s maintained all play a role in how long it keeps you cool and comfortable.

In this blog, we’ll break down the average lifespan of different air conditioner types, what affects their longevity, and how to tell when it’s time for a replacement or upgrade.

Average Lifespan of Different Types of ACs

Not all air conditioners are built the same − and their lifespans can vary depending on the type and how they’re used. Here’s a quick look at how long you can typically expect each type to last:

Split system air conditioners: These are very common in homes and usually last around 12 to 15 years with regular maintenance.
Ducted air conditioning systems: Ducted systems are built for whole-home comfort and can last 15 to 20 years, especially if professionally installed and maintained.
Window or wall units: Compact and cost-effective, these tend to last 8 to 12 years, depending on usage and care.
Portable air conditioners: These have the shortest lifespan − usually 5 to 10 years − as they’re more prone to wear and tear.
Evaporative coolers: These can last 10 to 15 years, particularly in dry climates where they perform best.

Factors That Affect How Long an AC Lasts

The lifespan of your air conditioner isn’t set in stone − several factors can influence how long it keeps running smoothly. Here are some key things that can make a difference:

Quality of the unit: Higher-end models from reputable brands are built to last longer and handle wear and tear better.
Installation: A proper installation by a licensed professional ensures your system runs efficiently from day one.
Maintenance: Regular servicing, cleaning filters and checking for minor issues can significantly extend your system’s life.
Climate and usage: Air conditioners in hot or humid regions that run constantly may wear out faster than those used occasionally.
Size and efficiency: An air conditioner that’s too small or too large for your space will work harder and burn out sooner.
Air quality and environment: Dust, pet hair and debris can clog components and strain the system over time.

A couple shocked by their latest power bill

Signs Your Air Conditioner is Nearing the End

Not sure if your air conditioner is on its last legs? There are a few telltale signs that it might be time to consider a replacement.

Keep an eye out for the following:

Frequent breakdowns: If you’re calling the repair technician more often than usual, your system may be wearing out.
Rising energy bills: Older systems lose efficiency over time, which means they work harder − and cost more − to cool your home.
Uneven cooling: Hot and cold spots or inconsistent temperatures can signal that your system is struggling to keep up.
Strange noises or smells: Banging, rattling or musty odours could indicate serious internal issues.
Age of the system: If your unit is more than 10-15 years old, it might be nearing the end of its lifespan, especially without regular maintenance.

Catching these signs early can save you from an uncomfortable breakdown.

How to Extend the Life of Your Air Conditioner

Want to get the most out of your air conditioner? A few simple habits can help extend its lifespan and keep it running efficiently for years.

First, regular servicing is key. Aim to have your system professionally inspected and cleaned at least once a year − ideally before summer hits. This helps catch small issues before they turn into costly breakdowns.

Next, don’t forget the air filters. Cleaning or replacing them every couple of months improves airflow and reduces strain on the system. It also keeps your indoor air fresher.

Keep the outdoor unit clear of leaves, dirt and debris so it can “breathe” properly. And when possible, give your air conditioner a break. Use ceiling fans to circulate cool air and set a smart thermostat to manage temperatures more efficiently.

With a little TLC, your air conditioner can last longer and perform better.

When It’s Time to Repair vs Replace

Deciding whether to repair or replace your air conditioner can be tricky, but a few key factors can help make the choice clearer. Here’s what to consider:

Age of the unit: If your system is more than 10-15 years old, it may be more cost-effective to replace it rather than invest in ongoing repairs.
Repair costs: A good rule of thumb: if a repair costs more than half the price of a new unit, replacement is usually the smarter option.
Energy efficiency: Older systems tend to be less efficient. Upgrading to a newer model could lower your energy bills and reduce your carbon footprint.
Frequency of breakdowns: Constant repairs are a sign your system is wearing out − and that money could be better spent on a reliable upgrade.
Home comfort: If your unit struggles to cool your home properly, a new system can offer improved comfort and performance.

A couple discusses replacing their old AC with a technician

Choosing a Long-Lasting Replacement System

If your current air conditioner is on its last legs, it’s a great time to choose a replacement that will stand the test of time. Start by looking for a trusted brand known for quality and reliability.

While cheaper models might be tempting, investing in a high-efficiency system often pays off in the long run with better performance and fewer breakdowns.

Check the energy efficiency rating − look for systems with a high SEER (Seasonal Energy Efficiency Ratio) or an Energy Star label. These units tend to last longer because they’re built with better components and operate more efficiently.

Professional installation also plays a huge role in longevity. A poorly installed system can wear out faster, even if it’s top-of-the-line. And don’t forget to ask about warranty coverage − it’s a good sign of how much confidence the manufacturer has in the product. Choose wisely, and your new system could last 15 years or more.

Get the Most Out of Your AC

Air conditioners aren’t built to last forever, but with the right care and a little planning, you can get the most out of yours.

On average, systems last between 10 and 20 years, depending on the type, usage and maintenance. Regular servicing, keeping filters clean and watching for signs of wear can all help extend your air conditioner’s life. But when repair costs start stacking up or your unit just can’t keep up anymore, it might be time for a replacement.

Choosing a reliable, energy-efficient system and having it professionally installed will set you up for years of comfort. So, whether you’re maintaining your current unit or shopping for a new one, knowing what to expect can help you stay cool − literally and financially.

Need help deciding what’s best? Don’t hesitate to reach out to a professional for advice.

Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.