Aircon Repair
Aircon Repair near you
Air conditioners in Australia fail on the hottest afternoon of the year, because that is the first time all summer the system is asked for everything it has. A marginal capacitor, a filter thick with dust, a slow refrigerant leak or a blocked condensate drain can all sit quietly through spring and then announce themselves during a heatwave, when every technician in the postcode already has a full day booked.
Tell us about your air conditioner repair project and we’ll help you find local HVAC technicians who serve your area.
Free for homeowners · No obligation to hire
On this page
Repair work splits into two categories worth telling apart. The first is everything outside the sealed refrigerant circuit — filters, fan motors, contactors, capacitors, control boards, drains, sensors and wiring — which a competent technician can diagnose and replace. The second is anything that opens the refrigerant circuit, which is licensed work: a refrigerant handling licence must be held by any person carrying out work on refrigeration and air conditioning equipment, and handling fluorocarbon refrigerant without one is a strict liability offence.
That distinction also explains why a system that is short on refrigerant should never simply be topped up and sent on its way. Refrigerant does not get consumed; if the charge is low, it escaped, and the leak is the actual fault. A repair that finds and fixes the leak, then recovers, evacuates and recharges the circuit properly, costs more on the day and far less over the life of the machine.
Signs your air conditioner needs repair rather than another season of hoping
- The room drifts warmer through the afternoon even with the system running continuously at a sensible set point.
- Air coming from the indoor unit is barely moving, or is moving but is nowhere near cold.
- Water drips down the wall inside, or pours from the outdoor drain in a way it never used to.
- Ice appears on the copper pipework or across the indoor coil, which usually means low charge or starved airflow.
- The outdoor unit hums but the fan does not start, or the compressor tries to start and trips the circuit breaker.
- The system runs for a few minutes, stops, and restarts again a few minutes later without ever settling.
- An error code appears on the controller or the indoor unit's lights flash in a repeating pattern.
- A burning, musty or sour smell comes out of the vents when the system starts.
Common faults behind an aircon that has stopped cooling
Most call-outs come down to a short list, and the cheapest possibilities are worth eliminating first. Before booking, check that the filters are clean, the outdoor unit is not buried in shrubs or blocked by a fence, the circuit breaker has not tripped and the controller is in cooling mode at a realistic temperature rather than in fan or dry mode.
- A clogged filter or blocked coil: the most common cause of weak airflow, poor cooling and eventual icing, and the one a household can prevent entirely.
- A failed run capacitor: a small component that fails often in hot conditions and stops a fan or compressor from starting, usually with a hum and a trip.
- A refrigerant leak: gradual loss of cooling over seasons, ice on the pipework, and a system that runs constantly without reaching the set point.
- A failed outdoor fan motor: the compressor runs, heat has nowhere to go, and the unit shuts down on high pressure after ten or fifteen minutes.
- A blocked condensate drain: water backs up in the tray and either trips a float switch or finds its way into the room.
- Sensor and control faults: a thermistor reading wrongly makes the system short-cycle or ignore the room entirely, and a control board fault often shows as an error code.
- Dirt and corrosion on the outdoor coil: coastal salt air is hard on aluminium fins, and a coil that cannot reject heat loses capacity on exactly the days you need it.
When a breakdown in a heatwave becomes urgent
Losing cooling is uncomfortable for most households and dangerous for some. Older people, infants, anyone unwell and anyone taking medication that affects heat tolerance are at real risk during a run of hot days, so treat a breakdown in that household as urgent, tell the technician when you call, and in the meantime close the house up during the day, use fans, keep fluids up and move to the coolest room or to an air-conditioned public space such as a library or shopping centre.
Some symptoms should stop you using the system immediately rather than waiting for the booking. A burning smell, scorch marks at the isolator or switchboard, a breaker that trips every time the unit starts, or water running near cabling all point to an electrical fault, and that is a matter for a licensed electrical worker. Switch the system off at the isolator and leave it off. Water dripping inside also needs a fast response, because a condensate leak damages plasterboard and cornice long before anyone decides the aircon is worth looking at.
Why regassing is licensed work, and what a proper repair involves
Anyone who opens the refrigerant circuit needs a refrigerant handling licence from the Australian Refrigeration Council, and the scheme exists because the gases involved are potent greenhouse gases. The ARC's code of practice for systems other than self-contained low charge equipment requires that refrigerant be recovered rather than released, that systems be evacuated properly before charging, and that equipment is not charged with a refrigerant of higher global warming potential than it was designed to use.
In practice a competent leak repair means finding the leak with electronic detection or tracer methods, repairing it, recovering the remaining charge, evacuating the circuit and weighing in a fresh charge to the manufacturer's specification, then rechecking pressures and temperatures with the system running. Anyone offering a quick top-up without diagnosing where the gas went is selling you the same repair again next summer.
The electrical side stays with the state regulator. Replacing an isolator, correcting supply wiring or working in the switchboard is electrical work that must be done by a licensed electrical worker, who issues the state certificate for it — a certificate of compliance for electrical work in New South Wales, a certificate of electrical safety in Victoria.
Filter, coil and drain care you can safely do before summer
- Slide out the indoor filters regularly through the cooling season, vacuum or rinse them, and let them dry fully before refitting — this is the single highest-value thing a household can do.
- Keep at least the manufacturer's clearance around the outdoor unit, and cut back the shrubs, lattice or stored junk that has crept up against it since last summer.
- Hose loose leaves and lawn clippings off the outdoor coil with gentle pressure, from the outside in, with the power off at the isolator.
- Watch where the condensate drain discharges and make sure the water is actually running away rather than pooling against the wall or into a garden bed that never dries.
- Wipe the indoor unit's louvres and grille with a damp cloth, and avoid harsh solvents on plastic that has spent a decade in the sun.
- Run the system in heating or fan mode briefly outside the cooling season, so a fault is discovered in October rather than during the first week of summer.
Repairing an old air conditioner or replacing it
Repair is usually the right answer for a system that has been reliable, is out of its early years but not ancient, and has failed on a discrete component such as a capacitor, a fan motor, a contactor or a sensor. Those parts are generally available, the labour is contained and the rest of the machine is untouched.
Replacement starts to make sense when the compressor has failed, when the circuit has leaked more than once in different places, when the unit uses a refrigerant that is now difficult or expensive to obtain, when spare parts for the model are no longer supported, or when the system was the wrong capacity for the room from the day it went in. A replacement is also the moment to correct the mistakes in the original installation — a badly placed outdoor unit, an indoor head blowing straight into a wardrobe door, or a drain that never had enough fall.
Age alone is a weak argument on its own, but it changes the arithmetic. Money spent on a second major repair to a system near the end of its service life buys you a machine that is still near the end of its service life, and efficiency has improved noticeably across a decade of new models.
Consumer guarantees when a repair does not hold
Repairs are covered by the consumer guarantees in the Australian Consumer Law as well as by whatever the business promises. The ACCC describes those guarantees as automatic and not able to be taken away: services must be supplied with due care and skill, be fit for the purpose you described and be completed within a reasonable time. A sign on a counter saying no refunds on repairs does not remove them.
For that reason, insist on a written record of what was diagnosed, what was replaced and what was measured, and ask what labour warranty the business offers on its own work. Where the equipment is still within the manufacturer's warranty period, check before the visit whether the brand requires an authorised service agent, because an unauthorised repair can affect the cover on the equipment itself.
Service in spring, not in the middle of summer
The Australian service calendar is the inverse of the northern hemisphere one. Peak cooling load arrives in December and runs through February, which makes October and November the sensible months for a service: capacitors on the edge of failing, drains blocked with a year of dust, a coil matted with grass clippings and a charge slightly down are all cheaper to deal with before the first hot week than during it.
Reverse cycle systems have a second season to plan for. Winter here is June, July and August, and a system that cooled adequately in summer can still show up a heating fault — a failed reverse valve, a defrost problem or an outdoor unit iced up on a cold morning — the first time it is asked to heat. A quick test run in autumn is a cheap way to find that out while technicians still have spare capacity in the diary.
Aircon Repair: frequently asked questions
My air conditioner is blowing warm air. What is the most likely cause?
If the fan runs but the air is not cold, the usual suspects are a filthy filter or blocked coil, a failed outdoor fan or capacitor, or a refrigerant leak. Check first that the controller is in cooling rather than fan or dry mode and that the outdoor unit is actually running. If the outdoor unit is silent while the indoor unit blows, note that before you call — it narrows the diagnosis considerably.
Can a handyman top up the gas in my split system?
No. Handling fluorocarbon refrigerant requires a licence issued by the Australian Refrigeration Council, and doing it without one is an offence of strict liability under the Commonwealth regulations. Beyond the law, a system that is low on refrigerant has a leak, and adding gas without finding it wastes your money and vents a potent greenhouse gas.
Why does water drip out of the indoor unit onto the floor?
Cooling condenses moisture out of the air, and that water is meant to run from a tray through a drain line to the outside. When the line blocks with dust and slime, or when the tray or line has been installed without enough fall, the water backs up and overflows into the room. Some units have a float switch that shuts the system down instead. It is a common repair and worth attending to quickly, because the damage is to your wall rather than to the machine.
Is it worth fixing an air conditioner that ices up every summer?
It is worth diagnosing properly, because icing has two very different causes. Restricted airflow from a blocked filter, a dirty coil or a failing indoor fan is an inexpensive fix. A refrigerant charge that is low because the circuit is leaking is a bigger job, and if the same system has leaked repeatedly in different places, replacement usually becomes the better spend.
How does LokalMatch work for an air conditioner repair?
You post the fault once, with your postcode, the type of system and what it is doing — no cooling, tripping the breaker, leaking water, showing an error code — and repair businesses covering your area get in touch. They pay LokalMatch for those requests. LokalMatch does not perform repairs, does not diagnose faults, does not set or quote prices and does not vet, rank or recommend any business, so licence checks and comparing what each business proposes to do stay with you.
Sources
- Australian Refrigeration Council: Refrigerant handling licence
- Australian Refrigeration Council: Frequently asked questions
- ARC code of practice: systems other than self-contained low charge systems
- Australian Refrigeration Council: Legislation and regulation
- NSW Government: Electricians and electrical licences
- Energy Safe Victoria: Certificates of electrical safety for consumers
- ACCC: Consumer guarantees
Written by the LokalMatch editorial team. Last reviewed 14 September 2026. How we write and check our guides
Find HVAC technicians by city
Australian Capital Territory
Show 1 citiesHide cities
New South Wales
Show 8 citiesHide cities
Northern Territory
Show 1 citiesHide cities
Queensland
Show 10 citiesHide cities
South Australia
Show 1 citiesHide cities
Tasmania
Show 2 citiesHide cities
Victoria
Show 5 citiesHide cities
Western Australia
Show 2 citiesHide cities
What affects the cost of air conditioner repair
Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:
- Type of system and fuel source
- Size and efficiency of the equipment
- Condition of the existing ductwork and venting
- Electrical or gas line changes
- Access to the furnace room, attic or outdoor unit location
- Removal and disposal of the old equipment
- Emergency or after-hours service
How to compare HVAC technicians before you hire
- Hire a technician who is licensed for heating, cooling and gas work in your area.
- For a new system, ask for a load calculation for your home rather than a size based on the old unit.
- Get written quotes that list the equipment, ductwork changes, removal of the old unit and any electrical work.
- Ask how they handle service calls and repairs after installation, including in the middle of winter.
- Compare the full scope of each quote, not only the equipment on it.
Questions to ask HVAC technicians before you hire
- Are you licensed for this type of heating, cooling or gas work in my area?
- How did you decide what size of system my home needs?
- Does this installation need a permit, and will you take care of it?
- What does the manufacturer's warranty cover, and what does your labour warranty cover?
- Will you need to change the ductwork, venting or electrical to make this work?
- Do you offer maintenance plans, and what do they include?
- How quickly can you respond if the system stops working?
When to call a pro for air conditioner repair
- If you smell gas, leave the home and call your gas utility's emergency line from outside.
- If a carbon monoxide alarm goes off, get everyone outside and call emergency services.
- No heat in cold weather, or a furnace that keeps shutting off
- Unusual noises, burning smells or a big jump in energy use
Air conditioner repair permits and local rules
Some air conditioner repair work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.
Permits and licensingSeasonal maintenance
This job is part of our home maintenance checklists for:
Guides about air conditioner repair
- ✦
HVAC Contractors guide
Heating and cooling in Australia is a cooling problem first. For most households the main appliance is a reverse cycle air conditioner, a single unit that cools in summer and heats in winter by running the refrigeration…
Read guide - ✦
Ducted Heating Installation guide
Central heating installation in Australia usually means ducted gas heating. A single gas heater unit sits in the roof space, under the floor or outside against a wall, and warmed air travels through insulated ductwork…
Read guide - ✦
Ducted Heating Repair guide
Ducted gas heating repair covers the faults that stop a central gas heater working properly: no heat at all, air that never gets warm, a unit that lights and then shuts down, weak airflow at the outlets, or noise and…
Read guide
Ready to get air conditioner repair quotes?
Tell us about your air conditioner repair project.
Do you offer air conditioner repair services?
Join LokalMatch to get matched with homeowners in the areas you serve.