How Long Do Air Conditioners Last?

Air conditioners last 10 to 15 years, but that’s only the short answer. Some AC units die prematurely from neglect, while others last 20 years or more with the proper care. 

At LG Home Comfort, we’ve helped thousands of homeowners in Southern Ontario extend the life of their air conditioners, save on energy bills, and avoid costly breakdowns. So, if you’re wondering “How long do air conditioners last?” or “How long do air conditioners last in Canada?” and want to maximize your cooling system’s lifespan, we have answers for you. In this guide, we’ll discuss:

• the real air conditioner lifespan of different AC units, 
• proven tips to add YEARS to your AC’s life, plus
• when to repair vs. replace.

Stick around and you’ll know exactly how long your air conditioning unit should last (and how to ensure it does). Let’s get started! 

How Long Does an Air Conditioner Last? AC System Comparison

An air conditioning system’s lifespan depends heavily on the type you own. Here’s a quick comparison:

How Long Do Central Air Conditioners Last?

Central air conditioning systems typically last 15 to 20 years with proper maintenance; however, in Southern Ontario’s frequent shifts between warm and cold seasons, many units fail closer to 12–15 years. This is primarily due to:

• Overuse during heat waves 
• Poor maintenance
• Moisture buildup during winter or rainy seasons
• Climate-related stress (especially with temperature fluctuations)

💨 How to extend central AC lifespan: Central air system repairs can get expensive if you skip maintenance. Regular tune-ups from a reliable HVAC provider like LG Home Comfort help you identify and address minor issues early, improve performance, and extend AC lifespan by several years.

Image Source: Shutterstock

How Long Is a Split AC Lifespan?

The lifespan of a split AC unit can reach up to 30 years with proper care, nearly double that of window or portable units. That’s what makes them one of the best HVAC systems to install. However, this type of cooling system can lose efficiency over time without:

• regular maintenance
• proper sizing
• installation quality

💨 How to extend Split AC lifespan: Set off on the right foot with professional installation and correct sizing. If you don’t, your system may short-cycle, work harder than necessary, and wear out more quickly.

How Long Do Portable Air Conditioners Last?

Portable air conditioner systems typically last 5 to 10 years. They’re a popular pick for renters, condo owners, and small-space dwellers because they’re easy to move around and install, but they’re not built to last as long. (Plus, they’re not the most energy-efficient.) 

Their shorter air conditioner lifespan comes down to:

• Lower build quality
• Frequent relocation
• Limited maintenance options
• Higher wear and tear on key parts

💨 How to extend portable AC lifespan: To keep your AC unit closer to the 10-year mark, remember to clean or replace air filters regularly, store the unit when not in use, and limit its movement. For better comfort and long-term energy efficiency, consider upgrading to more durable options, such as split ACs. 

→ Learn more: How to Improve AC Efficiency

How Long Do Window Air Conditioners Last?

Window air conditioners are one of the worst options if you’re looking for durability—they only last an average of 8 to 10 years. With proper maintenance and in less demanding climates, you might stretch that to 15, but most units fail sooner because they battle the elements 24/7.

Here’s why these units struggle to survive Ontario’s climate:

• Constant exposure to rain, snow, and UV rays
• Shaking and internal wear (if not properly installed)
• Frequent on/off cycling

💨 How to extend window air conditioning lifespan: The outdoor parts are most vulnerable to sun, wind, and rain. You can install a small roof or awning to shield it from direct exposure, just make sure it doesn’t restrict airflow.

Image Source: Shutterstock

When to Repair vs. Replace Your Air Conditioner

The answer to “How long do air conditioners last?” depends on you and how you care for your unit. But when parts go haywire, you might wonder: Should you repair or replace? An air conditioner replacement might be in the cards if:

• Your unit is 10+ years old and breaks down often
• Repair costs more than half the price of a new AC system
• Energy bills rise despite regular maintenance
• AC doesn’t blow enough cold air to cool your space
• Newer models offer better energy efficiency and features

→ Learn more: Signs That It’s Time to Either Repair or Replace Your AC

Make Your Air Conditioner Last Longer with LG Home Comfort

When customers ask, “How long do air conditioners last?” we say it depends not only on the unit, but also on the care it receives. Regular maintenance, timely repairs, and professional tune-ups can extend the life expectancy of your AC by up to 15 years.

At LG Home Comfort, we take pride in delivering exceptional maintenance services that keep your system running efficiently year after year. Our comprehensive AC maintenance plans include a 26-point inspection to ensure your system is in perfect working condition. 

We cover everything from wiring and connection checks to condensate drain inspections. Our fully equipped and experienced technicians are available for same-day or next-day services, plus 24/7 support.

Give your AC the care it deserves. Contact us today and let’s maximize your AC’s lifespan!