The unit has run fine for years. Then one January afternoon the lounge room won’t get below 27 degrees, and you’re deciding between a call-out, a new unit, or just sweating it out until something gives.
The repair bill is rarely the whole story. A cheap fix on a tired system can be money down the drain. An expensive fix on a young unit with one dead part can be the smartest spend you make all year. What you’re really deciding is how much life the machine has left.
Key Insight: A repair deals with one fault, while replacement deals with how old the whole system is, and that’s usually the question you’re actually asking.
Start with the age
The data plate on the outdoor unit gives the model and the year it was made. Split systems in Brisbane homes often last ten to fifteen years. A unit that has been serviced every year and sits in shade can go longer. One that has baked in full western sun and never had its coil cleaned might not see eight.
Once a unit passes about ten years, faults tend to arrive in a chain. A fan motor goes, and that’s a small job. Six months later the capacitor fails, and then the board starts playing up. Parts can be hard to source for older models, so a technician may end up replacing two things at once.
Age doesn’t mean replace automatically. It does mean the next quote deserves a closer read.
Simple faults and serious ones
Some faults are cheap and boring. A blown fuse on the control board, a tired capacitor, a dead remote receiver or a faulty temperature sensor. If the unit starts, cools and runs quietly after a part swap, it probably has years left.
Others are a different story. A failed compressor is the big one. A refrigerant leak that needs finding and sealing can cost real money, and so can damage to the heat exchanger. If your unit runs on R22 refrigerant, expect older systems to cost more to keep charged, because that gas is being phased out.
Get two quotes in the same week
Ask for a repair quote and a replacement quote at the same time. Comparing one against a memory of the other doesn’t tell you much.
Ask the technician what failed, what the parts cost, and whether the same fault is likely to come back within a year. Then price a new unit properly, with pipework and electrical work included. Old copper lines can leak or restrict a new system, so that cost belongs in the comparison.
Plenty of people use this as a rough guide: when the repair starts to approach what a new system costs, on an older unit, replacement is usually the better value. You’re not paying to keep a machine alive that might fail again next month. You’re buying a new warranty and a better energy rating. Treat that as a starting point and not a formula.
When a repair is the right call
A unit that’s only a few years old, has been serviced regularly and is missing one part is worth fixing. So is a system that still cools well and needs a cheap sensor or board. Replacing a healthy unit because one part failed is throwing money away.
A service record makes this much easier to judge. Our guide to servicing your air conditioner explains what a proper service checks. A technician who has seen the unit before can also spot patterns, like the same fault returning every summer, and that history is worth more than any single quote.
Two symptoms that aren’t always faults
A unit that drips water or ticks can look broken when it’s doing its job. Condensate drips are normal in humid weather. A pool of water inside, or a drip that won’t stop, usually means the drain line is blocked or the tray has cracked. A tick when the unit starts or stops is normally plastic and metal expanding and contracting.
A rattle, buzz or grinding noise is a different matter. Switch the unit off at the wall and get it looked at before it runs again.
If you do replace it
Replacement is more than swapping one box for another. The new unit should be sized for the room, installed by a licensed technician and matched to the building. Ask whether the existing pipework is being reused, and whether it’s in good enough shape to be.
In apartments, moving an outdoor unit or touching common property usually needs body corporate approval. Sort that out before the old unit comes off the wall. Nothing ruins a weekend like a half-removed system and a committee that hasn’t met yet.
Our air conditioning services page for Brisbane covers repairs and replacements, so you can ask about both in one visit.
What to ask before you agree
A good technician will explain their reasoning without being pushed. Ask what caused the fault, whether it will likely come back, and what else might need replacing in the next few years. Get the quote in writing, with parts, labour, warranty terms and any extra work listed separately.
If someone tells you to replace the unit without explaining why, get a second opinion before you sign anything.
Keep a simple record too. Write down when the unit went in, when it was last serviced and every repair since. Next summer, you’ll both have the full picture.
Key Takeaways
- Check the unit’s age first, because a system past about ten years deserves a closer look before any repair.
- Simple faults on an otherwise healthy unit are usually good value.
- Get a repair quote and a replacement quote in the same week, and compare them properly.
- Major faults on an older unit often point towards replacement.
- Keep a service and repair record so each decision builds on the last.
Frequently Asked Questions
How long does an air conditioner last in Brisbane?
Many split systems are built to run for roughly ten to fifteen years. Regular servicing, a shaded outdoor unit and clean filters help it reach the upper end of that range. Neglect and heavy use shorten it.
Is it worth fixing a unit that’s more than ten years old?
Sometimes. A simple fault on an older unit that otherwise runs well can be worth fixing. Repeated repairs or a major fault usually tip the balance towards replacement.
What can I check myself before calling someone?
Confirm the unit has power, replace the remote batteries, check the thermostat settings, clean the filters and clear leaves from around the outdoor unit. Leave refrigerant and electrical work to licensed technicians.
If you’re weighing a repair against a new unit, a proper look usually settles it. Send an enquiry through the contact form on the SJK Collective website and tell us the age of the unit, the brand if you know it, and what you’ve noticed. We’ll tell you straight whether it’s worth fixing. If you’re in South Bank, our air conditioning page for South Bank lists what we cover there, and the same goes for West End and the CBD.
