How long will an air conditioner last | Midea Canada

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How Long Will an Air Conditioner Last? Tips to Extend Your AC’s Lifespan

When the weather gets hot, your air conditioner becomes very important. But like any other appliance, it won’t last forever. Knowing how long it can last helps you plan ahead. You’ll know when to clean it, fix it, or get a new one.

2025/11/13

In this guide, we’ll talk about how long air conditioners usually last. We’ll also look at what makes them wear out faster and how to tell when yours is getting old. You’ll find simple tips to help it last longer. Let’s get started.

How Long Do Air Conditioners Last?

Most air conditioners last about 10 to 20 years. The exact lifespan depends on how often you use it, how well you maintain it, and how good the unit is. Different types of air conditioners have different average lifespans, as shown below.

Type of Air Conditioner

Average Lifespan

Central air conditioner

15–20 years

Window unit

5–15 years

Ductless mini-split system

15–20 years

Portable AC unit

5–10 years

If you look after your air conditioner—clean the filters, have it checked each year, and fix small problems early—it can last more than 20 years. But as it gets older, it may use more power and not cool as well. That can make your energy bills higher and your home feel less comfortable.

Factors That Affect the Lifespan of an Air Conditioner

How long can air conditioner last depends on simple, everyday things: how you use it, how you look after it, and where you live. When you know these, you can help your air conditioner work well for a long time.

1. How Much You Use It

Air conditioners that run all day wear out faster. In warmer places, they don’t get much rest. Try setting the temperature a bit higher or use fans to help. This takes some pressure off the system and helps it last longer.

2. Installation Quality

If an air conditioner isn’t installed the right way, it won’t last long. The wrong size or poor fitting pipes make it work harder than needed. That extra effort can lead to more wear and early breakdowns.

3. Maintenance

Regular cleaning and small fixes help your air conditioner stay strong. When filters are dirty or parts are ignored, the system struggles and uses more power. Cleaning and checking it often keep it running smoothly.

4. Where You Live

Your location matters too. Near the sea or in damp areas, parts may rust or weaken faster. Wiping and covering the outdoor unit can help protect it from weather damage.

5. Brand and Quality

Better-built air conditioners usually last longer. Good materials and design help prevent problems. Choosing a reliable brand can give you fewer repairs and more years of cool, steady air.

How Can You Extend the Life of Your Air Conditioner?

Taking good care of your air conditioner helps it work better and last longer. Here are some easy ways to keep it in good shape.

1. Get a Yearly Checkup: Have a technician check your air conditioner once a year. They can find small problems early, clean coils, test parts, and keep the system running smoothly and safely.

2. Clean or Change the Filters: Dirty filters block airflow and make your air conditioner work harder. Replace disposable filters every few months or wash reusable ones monthly to keep the air clean and flowing.

3. Keep the Outside Unit Clean: Clear away leaves, dirt, and grass around the outdoor unit. Keep at least two feet of open space so air can move freely and prevent the system from overheating.

4. Use a Smart or Programmable Thermostat: Set the temperature higher when you’re not home. This lets your air conditioner rest, saves energy, and helps it last longer. In larger homes, using portable air conditioners in a few rooms can help keep things cool without making the main system work too hard.

5. Seal the Ducts: Leaky ducts waste cool air and make the system work harder. Seal cracks and add insulation to keep air inside, improve cooling, and help your air conditioner run efficiently.

Portable Air Conditioners

Signs Your Air Conditioner Is Nearing the End

Even with proper care, no air conditioner lasts forever. Recognizing early signs of trouble can help you avoid it breaking down on hot days. Here are some things to look for.

  • Reduced Cooling Efficiency: Takes longer to cool your home or uneven temperatures.
  • Unusual Noises: Grinding, banging, or squealing often indicate worn-out parts.
  • Frequent Repairs: Constant service calls are a clear signal of declining performance.
  • High Energy Bills: An old or struggling system consumes more energy to produce less cooling.
  • Refrigerant Leaks: Older models using R-22 (Freon) are costly and environmentally harmful.
  • System Age: If your AC is over 15 years old, replacement might be more cost-effective than repair.

Pro Insight: If you notice several warning signs at once, like high energy bills and weak cooling, it may be time to start planning for a new system. Most modern window air conditioners are more energy-efficient, quieter, and designed to cool rooms faster than older models.

Conclusion

So, how long does an air conditioner last? Most air conditioners work well for about 10 to 20 years. The exact time depends on how much you use them, how well you care for them, and the weather where you live. Cleaning regularly, changing filters on time, and getting a yearly check help your air conditioner last longer and use less power.

If it starts cooling poorly or needs repairs often, that’s a sign it may be time for a new one. For steady comfort, lower energy use, and reliable cooling, check out Midea air conditioners made to keep your home comfortable for many years.

FAQs

How often should you replace an air conditioner?

Most air conditioners last about 10 to 20 years. With good care, they can last a little longer.

If it keeps breaking down or doesn’t cool like before, it’s probably time to replace it. Repairs can add up fast.

A new model cools better, uses less energy, and lowers your bills over time.

Can an AC unit last 30 years?

It’s rare, but some well-built and well-maintained systems can reach 30 years. Most start losing efficiency long before that.

Even if yours still runs, it likely costs more to cool your home. Older parts wear down, and energy use goes up.

Replacing it with a newer, efficient model often saves money and keeps your home more comfortable.

Is it worth repairing a 10 year old air conditioner?

If the repair is small and your unit still cools well, fixing it makes sense. Many 10-year-old systems have a few solid years left.

But if repairs are pricey or cooling is weak, replacement might be smarter. You’ll save more in the long run.

Compare the repair cost to the price of a new, efficient model before deciding.

How long should AC run on a 100 degree day?

On a 100-degree day, your AC may run much longer than normal. Instead of the usual 15 to 20 minutes, it might stay on most of the time.

That’s normal — it’s just working harder to fight the heat. But if it runs constantly and still can’t cool, something’s wrong.

Low refrigerant, poor insulation, or a unit that’s too small could be the cause. Call a technician to check it out.