Although an AC rarely has a sentimental value, some of us find it hard to let it go. More often, we find it cheaper to have it repaired instead of replacing it with a new unit. However, like any other appliances we own, the air conditioner won’t last forever.

But how can you tell if your air conditioner needs a replacement?

Here we listed some red flags to watch out to help you decide whether the AC will do with a repair or better off replaced.

When to Replace Your Air Conditioning Unit


#1 It’s passed its lifespan

An average air conditioner can function for 8-10 years with regular maintenance. This information can help you decide if your AC needs repair or replacement. If it malfunctions before exhausting its lifespan, then the repair will surely do the trick. It is not a good investment anyway to buy a replacement earlier than necessary as AC can be very pricey.

Now, that doesn’t mean that your air conditioner will automatically stop working after 15 years. This is where deciding for a replacement gets difficult. Maybe your air conditioner has exceeded its lifespan with constant repair, but is the cost of repair worth it?

Always remember that the longer your AC functions beyond its lifespan, the closer it is to breakdown. Time will come when it will be beyond repair. Thus, it is better not to invest more money on repairs at this point.


#2 If Power Bills are Suffering

A good measure to know if your AC will need replacement is reflected on your electricity bill. Increases in power bills during summer is normal, a different story if it continues throughout the year. Compare your last years’ bills to your current one. Is there a relevant increase in energy consumption?

If the answer is yes, then you should get your air conditioner replaced. Buying a new air conditioning unit could be expensive. However, if you combine the repair expenses and an increase in electricity consumption, is the former the expensive choice?


#3 When You Expand Your House

A bigger house will require more ventilation. Therefore, if you recently have your house renovated and added more rooms to it, your previous AC won’t do anymore.

If you’re planning to expand your house and worried that you’ll need more ACs, here’s a tip. Place your air conditioning unit on a hallway where the chilled air can diffuse among several rooms at once. Otherwise, we suggest that you get a ducted AC so a single unit can be used in different rooms.


#4 The AC couldn’t Control the Humidity

Your air conditioning system must act as your home’s dehumidifier. Aside from cooling your home during summer, it must get rid of the high humidity indoor. Using humidity to know if your air conditioner needs replacement is a good measure.

The effects of humidity inside a home are often very visible. If the walls seem to sweat and the paint starts to peel, it is a clear indication of high humidity. Presence of mould and mildew is also a sign. If you can observe the following in your property despite running the AC, then the unit must have a problem.

Now, if repairs cannot make your air conditioner combat the high humidity, then it is a good sign to buy a new one. You would not want to risk prolonging the effects of humidity in your home, would you?



Between repair and replacement of the air conditioning unit, some of us are quick to choose repair. It seemed the cheaper option but not all the time convenient. Knowing when to replace your AC is important to make better decisions. We hope that you find our tips helpful.

BC & TM Leggatt is always happy to help you with your air conditioning concerns. Should you need our installation and repair services, give us a call at 07 4634 4895.