In most cases, repairing your air conditioner is cheaper than replacing it, especially if the unit is under 10 years old and the fault is minor. Replacement becomes the cheaper choice once the repair quote climbs past about half the price of a new system, or once an older unit starts failing more than once or twice a year. At QuickAir, we complete thousands of repair assessments a year across Melbourne, and we’ll always tell you honestly which way the numbers point for your unit.
This guide walks through how to make that call: the age of your system, how often it’s broken down, what it costs to run, and the repair and replacement prices you can expect in Melbourne. We’ve also factored in something Melbourne homeowners often miss, the Victorian Government rebate that can take a large chunk off a new system.
The quick way to decide: the 50% rule
The simplest test is the 50% rule. If the cost to repair your air conditioner is more than half the cost of a comparable new system, replacement is usually the better value. A few hundred dollars to fix a sensor on a five-year-old split system is an easy yes. A $1,800 compressor repair on a 14-year-old unit, when a new system installed costs $3,500, is where most people are better off replacing.
Two other thresholds matter alongside cost:
- Age. Most reverse cycle systems last 10 to 20 years depending on type and how well they’ve been maintained. Once a unit passes 10 to 12 years, repairs tend to be patching one worn part on a system where the next part is not far behind.
- Repair frequency. If you’ve called someone out more than once or twice in a single year, the running total of those repairs usually overtakes the cost of a reliable new unit.
When age, repair history, and repair cost all point the same way, the decision is clear. When they conflict, the rest of this guide helps you weigh them.
How to decide whether to repair or replace your air conditioner
How old is your unit?
Age is the first thing we look at on site. A split system in good condition can run 10 to 15 years, and a well-maintained ducted reverse cycle system can last 15 to 20. A unit in its first decade with a single fault is almost always worth repairing. Once you’re into the second decade, the economics shift, because efficiency drops, parts get harder to source, and one failure tends to be followed by another.
How often has it broken down?
A reliable air conditioner that gets an annual service should not be failing repeatedly. If yours has needed attention two or three times in a year, that’s a strong signal the system is near the end of its life. Each repair on its own might look reasonable, but they add up fast, and they buy you less and less time between faults.
How much is it costing you to run?
This is the factor people underestimate. Older fixed-speed units use far more power than modern inverter systems for the same comfort. A new high-efficiency reverse cycle split can deliver several times the heating and cooling per unit of electricity compared to a 12-year-old machine. In Victoria, the government estimates an efficient reverse cycle upgrade can save <a href=”https://www.energy.vic.gov.au/victorian-energy-upgrades/homes”>up to $460 a year</a> on energy bills. Over the 10-plus years of a new system’s life, that running-cost gap can outweigh the higher upfront price.
What refrigerant does it use?
Many older air conditioners run on R22 refrigerant, which has been phased out in Australia. If your unit needs a regas and it’s an R22 system, the gas is increasingly scarce and expensive, which can quietly push a “simple” repair into replacement territory. A technician can confirm what your system uses during the assessment.
What does AC repair cost in Melbourne?
Repair pricing depends on what’s actually wrong, but it falls into a few clear bands.
- Diagnosis or breakdown assessment: a flat fee to have a licensed technician find the fault. At QuickAir, our breakdown and repair assessment is a fixed $259 for new customers and $249 for returning customers, with no call-out fee on top. Our technicians carry major spare parts, so straightforward faults are often fixed in the same visit.
- Minor repairs: things like a capacitor, sensor, thermostat, or refrigerant top-up generally run a few hundred dollars including parts.
- Major repairs: a compressor or main control board failure is the expensive end, often $1,000 to $2,500 or more. This is the kind of repair that frequently fails the 50% rule on an older unit.
The point of a fixed-price assessment is that you know the diagnosis cost before anyone arrives, and any further work is quoted and approved by you first. There’s no bill that grows once the technician is in your home.
What does a new air conditioner cost in Melbourne?
Replacement costs vary widely by system type and size.
- Single split system, supplied and installed: roughly $1,800 to $4,800 for a standard Melbourne install, depending on the brand, capacity, and how difficult the install is.
- Ducted reverse cycle (whole home): typically $5,000 to $15,000 or more installed.
Installation quality matters as much as the unit itself. A poorly sized or poorly installed system runs harder, costs more to run, and fails earlier, which is how a “cheap” quote becomes the expensive option over time. When we provide an installation quote, the $149 quote fee is credited back against the job if you go ahead, so the assessment isn’t money out of pocket.
Repair vs replace in Melbourne: cost comparison
| Factor | Repair your AC | Replace with a new unit |
| Upfront cost | Fixed assessment around $259, plus parts. Minor fixes a few hundred dollars; major repairs $1,000 to $2,500+ | Single split installed roughly $1,800 to $4,800; ducted $5,000 to $15,000+ |
| Lifespan added | A few more years, but the unit’s age still applies | A fresh 10 to 20 years |
| Energy efficiency | Stays at the old unit’s rating, no improvement in running costs | Modern inverter systems use far less power; up to $460 a year saved in Victoria |
| Warranty | Original warranty likely expired | New manufacturer warranty (minimum 5 years on rebate-eligible systems) |
| Government rebate | Not applicable | Victorian rebate can take $1,610 or more off the upfront cost |
| Best when | Unit is under 10 years old and the fault is minor | Unit is 10 to 12+ years old, failing often, or repair exceeds 50% of a new unit |
Don’t forget the Victorian rebate
This is the part that changes the maths for Melbourne homeowners specifically. The Victorian Energy Upgrades (VEU) program offers an upfront discount on high-efficiency reverse cycle systems, applied straight to your installation invoice rather than claimed back later.
For a standard reverse cycle upgrade, the Victorian Government lists savings of up to $1,610 off the upfront cost and up to $460 a year on energy bills. If you’re replacing an old gas ducted heater with a reverse cycle system, the discount is larger again, with <a href=”https://www.energy.vic.gov.au/victorian-energy-upgrades/products/heating-and-cooling-discounts”>up to $5,530 off</a> and around $1,140 a year in bill savings. Most Victorian homes and businesses are eligible, the property and the system being replaced generally need to be at least two years old, and there’s no income test.
Factor that rebates in and the gap between repairing a tired old unit and replacing it narrows considerably. A repair that looks cheaper on paper can end up costing more once you account for the rebate you’d qualify for on a new system, plus the lower power bills that follow.
How we approach the repair or replace decision at QuickAir
The honest answer to “should I repair or replace?” depends on your specific unit, and giving that answer straight is something we’ve built the business on. When a technician assesses your system, we’ll tell you plainly if the repair is worth doing, and we’ll tell you just as plainly if it isn’t.
A couple of things make the decision easier for our customers:
- If replacing is the better call, the diagnostic fee isn’t wasted. Where a unit can’t be repaired cost-effectively, the initial booking fee is credited toward the cost of a new installation, in full or in part.
- Finance is available on new systems. For a replacement, we offer interest-free finance for up to six months through our lending partner, so a new system doesn’t have to be paid in one hit.
Across 20,000-plus customers, the systems we see have produced almost every fault a residential air conditioner can throw up, which is what sits behind our 100% workmanship guarantee on every job.
Frequently asked questions
Is it worth repairing a 10-year-old air conditioner?
It can be, if the fault is minor and the repair is well under half the price of a new unit. At 10 years a system is approaching the point where replacement starts to make more sense, so weigh the repair against the unit’s efficiency and recent reliability before spending money on it.
What is the 50% rule for air conditioners?
The 50% rule says that if a repair costs more than half the price of a comparable new system, you’re usually better off replacing. It’s a quick gut-check, best used alongside the unit’s age and how often it has broken down.
How much does it cost to replace a split system in Melbourne?
A standard single split system supplied and installed in Melbourne typically runs between $1,800 and $4,800, depending on brand, size, and install complexity. The Victorian rebate can reduce that upfront cost by $1,610 or more on eligible systems.
Can I get a rebate to replace my air conditioner in Victoria?
Yes. The Victorian Energy Upgrades program provides an upfront discount on approved high-efficiency reverse cycle systems, applied directly to your install price. Most Victorian homes qualify, and the discount is larger when you’re replacing an old gas ducted heater.
How long does an air conditioner last in Melbourne?
Most split systems last 10 to 15 years, and ducted reverse cycle systems 15 to 20 years, when serviced regularly. Skipping maintenance is the most common reason units fail early, often during the first hot or cold snap of the season.
Get a straight answer on your unit
If your air conditioner has stopped working or isn’t keeping up, the fastest way to know whether to repair or replace is to have it assessed by a licensed technician. Book online or call us on 1300 730 896, and we’ll get someone to you the same day or the next morning, give you an honest assessment, and a fixed price before any work goes ahead.