How Long Do Air Conditioners Last?

If you’re wondering how long your air conditioner will last, you’re not alone. An air conditioner is a major investment, and knowing its expected lifespan helps you plan for maintenance, repairs and eventual replacement.

On average, most air conditioners last between 10 to 20 years, but this depends on factors like usage, maintenance and the type of unit you have.

Regular servicing can extend the life of your system, while neglect can cause it to wear out faster. If your air conditioner is struggling to cool your home, making strange noises or increasing your energy bills, it may be reaching the end of its life.

In this blog, we’ll explore the average lifespan of different AC types, signs of ageing, and tips to keep your system running efficiently for years to come.

Average Lifespan of Different Types of Air Conditioners

Not all air conditioners have the same lifespan − some last longer than others depending on their type, usage and air conditioning maintenance.

Here’s a breakdown of how long you can expect different types of air conditioners to last:

• Split system air conditioners (12-20 years): Split systems are one of the most common types of AC units. With proper maintenance, including regular filter cleaning and servicing, they can last up to 20 years.
• Ducted air conditioning systems (15-25 years): Since ducted systems cool (and heat) an entire home, they often last longer than split systems. However, they require consistent maintenance, especially for ductwork and compressors.
• Window air conditioners (10-15 years): Compact and budget-friendly, window units can last over a decade with proper care. However, their efficiency tends to decline faster than larger systems.
• Portable air conditioners (5-10 years): These have the shortest lifespan due to frequent movement and exposure to dust. Regular filter cleaning can help extend their usability.

Choosing a quality unit and maintaining it properly can help maximise its lifespan, saving you money in the long run.

Factors That Affect Air Conditioner Lifespan

The lifespan of an air conditioner isn’t set in stone − it depends on several key factors. With proper care, some units can last more than 20 years, while others may fail much sooner.

One of the biggest factors is maintenance. Regularly cleaning or replacing filters, scheduling professional tune-ups, and keeping the coils free from dirt can make a huge difference in longevity. Usage frequency also plays a role. An AC that runs year-round in a hot climate will wear out faster than one used only in summer.

Installation quality is another crucial factor. A poorly installed unit may struggle to function efficiently, leading to early breakdowns. Additionally, unit quality and brand reputation matter − cheaper models often have shorter lifespans.

Lastly, environmental conditions like humidity, dust, and salt exposure (in coastal areas) can accelerate wear and tear. By taking care of your air conditioner and choosing a reliable model, you can extend its life and avoid costly replacements too soon.

Signs Your Air Conditioner is Nearing the End of Its Life

Even with regular maintenance, air conditioners don’t last forever. If your system isn’t keeping your home as cool as it used to, it may be time to consider a replacement.

Here are some common signs that your AC is on its last legs:

1. Frequent breakdowns – If you’re calling for repairs more often than usual, your unit may be wearing out. Constant fixes can quickly add up, making a replacement the smarter choice.
2. Rising energy bills – Older systems become less efficient over time, working harder to produce the same level of cooling. If your electricity bill is steadily increasing, your AC could be the culprit.
3. Weak airflow or inconsistent cooling – Struggling to cool your home evenly? If some rooms feel hot while others stay cold, your system might not be functioning properly.
4. Strange noises or odours – Grinding, rattling or hissing sounds often signal internal damage. Musty smells can indicate mould buildup.

If you notice these signs, it might be time to invest in a newer, more efficient air conditioner.

How to Extend the Life of Your Air Conditioner

Want to get the most out of your air conditioner? With the right care and maintenance, you can keep it running efficiently for years and delay the need for a costly replacement.

Here are some simple ways to extend its lifespan:

• Schedule regular maintenance – Having a professional service your AC at least once a year helps catch small issues before they turn into major repairs.
• Clean or replace air filters – Dirty filters restrict airflow, making your AC work harder. Check and clean them every month, especially during peak usage seasons.
• Keep the outdoor unit clean – Leaves, dirt and debris can clog the external unit. Regularly clear the area around it to improve airflow and efficiency.
• Don’t overwork your AC – Setting the thermostat too low forces the system to work harder. Keep it at a reasonable temperature to reduce strain.
• Check refrigerant levels – Low refrigerant can cause cooling issues and damage your compressor. A technician can ensure your system has the right levels.

By following these steps, you can maximise your air conditioner’s lifespan and enjoy consistent cooling for years to come.

When to Replace vs Repair Your Air Conditioner

Deciding whether to repair or replace your air conditioner can be tricky. In some cases, a simple fix can keep your unit running smoothly. But if problems keep coming back, replacing it might be the better long-term investment.

One key factor is age. If your AC is more than 10-15 years old and frequently breaks down, repairs may not be worth the cost. Newer models are also far more energy-efficient, helping you save on electricity bills.

Repair costs are another consideration. A good rule of thumb is the 50% rule − if a repair costs more than half the price of a new unit, replacement is the smarter choice.

Look for warning signs like poor cooling, rising energy bills, or unusual noises. If your system struggles despite regular maintenance, it’s time to weigh your options.

Ultimately, replacing an outdated air conditioner can bring better efficiency, lower costs and improved comfort. If you’re unsure, a professional technician can assess whether a repair or a full upgrade is the best solution.

Extend the Life of Your AC

Air conditioners are built to last, but their lifespan depends on factors like maintenance, usage and installation quality. While most units last between 10 to 20 years, regular servicing and proper care can help you get the most out of your system.

If your air conditioner is showing signs of wear – like frequent breakdowns, rising energy bills or weak cooling – it might be time to consider a replacement. Upgrading to a newer, more energy-efficient model can save you money on repairs and electricity in the long run.

By keeping up with maintenance, cleaning filters and scheduling professional check-ups, you can extend the life of your AC and keep your home comfortable for years to come. If you’re unsure whether to repair or replace your system, consulting an expert can help you make the best choice.

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.