If your split or ducted air conditioner is running but the air coming out isn’t as cold as it used to be, a low refrigerant charge is one of the most common culprits Brisbane technicians see, especially heading into the warmer months. “Regas” gets thrown around loosely, but it’s worth understanding what it actually involves before you book one, because a regas on its own doesn’t always fix the underlying problem.
What a Regas Actually Is
Refrigerant (gas) is the substance that cycles through your air conditioner’s coils to absorb and release heat, and it’s a sealed system that shouldn’t lose pressure over time under normal operation. A regas means a licensed technician recovers what’s left, checks the system for leaks, repairs any leak found, then recharges the circuit to the manufacturer’s specified pressure for your unit and outdoor conditions. In Queensland, handling refrigerant legally requires an ARCtick licence, so this isn’t a DIY or handyman job.
Signs Your System May Need One
- The unit runs but blows air that’s only slightly cool, or not cold at all
- Ice forming on the indoor coil or the outdoor unit’s refrigerant lines
- The system short-cycles, switching on and off more frequently than normal
- A hissing sound near the indoor or outdoor unit, which can indicate an active leak
- Noticeably higher power bills for the same amount of use, as a low-gas system works harder to reach set temperature
If any of these sound familiar, it’s worth reading our guide on why your air conditioner might not be cooling for the fuller list of causes, since not every cooling issue is gas-related.
Why You Can’t Just “Top It Up”
Refrigerant doesn’t get consumed the way fuel does — if the level has dropped, gas has escaped somewhere, whether through a corroded pipe joint, a damaged coil, or a fitting that was never sealed properly at installation. Simply adding more gas without finding and repairing the leak means you’ll be back to square one within months, and you’ll have paid for the same job twice. A proper regas always includes leak detection first, using either an electronic sniffer, UV dye, or a pressure decay test depending on the system and where the leak is suspected.
What the Job Involves
A technician will connect gauges to the system, recover any remaining refrigerant, pressure-test the circuit to locate the leak, carry out the repair (which might mean re-flaring a joint, replacing a section of pipe, or repairing a coil), pull a vacuum to remove air and moisture from the lines, then weigh in the correct refrigerant charge for your specific unit. Getting the charge right matters — overcharging or undercharging both reduce efficiency and can shorten compressor life.
What It Costs in Brisbane
Pricing depends on the refrigerant type, how much is needed, and how easy the leak is to find and repair. As a rough guide, a straightforward regas on a domestic split system with an accessible leak typically starts from around $250–$400, while ducted systems, harder-to-access leaks, or older units on R22-type refrigerant (now being phased out and more expensive to source) can run higher. Any reputable technician should give you a firm price after diagnosis rather than a guess over the phone, since the leak location genuinely changes the labour involved.
New System vs Repair — When It’s Worth Considering
If your unit is older, has needed more than one regas in recent years, or is still running on R22 gas, it’s worth weighing the cost of an ongoing repair cycle against replacement. A modern system on current refrigerant is more efficient to run and won’t leave you chasing an increasingly hard-to-source, increasingly expensive gas type. A technician can talk you through both options honestly rather than defaulting to whichever is more profitable for them.
How Long Does It Take?
A straightforward regas with an easily located leak is usually a same-day job, often completed in two to three hours including the vacuum and pressure-test steps. Harder-to-access leaks, or a fault buried in a ducted system’s ceiling-mounted coil, can take longer or need a second visit if a part has to be sourced. A technician should be able to give you a realistic timeframe once they’ve had eyes on the system, rather than promising a quick fix before diagnosis.
Book an Aircon Regas in Brisbane
Integrated Trade Services is a licensed, ARCtick-accredited team servicing split and ducted air conditioners across Brisbane and Moreton Bay, including leak detection, repairs and regas. If your system isn’t cooling like it should, get in touch to book a diagnosis, or see our full range of air conditioning services.
Related guides
- Air conditioner not cooling? Common causes
- Air conditioner water leaking in Brisbane: causes and fixes
- How often should you service your air conditioner?
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