How to Tell If Your Air Conditioner Needs Regassing
Refrigerant (commonly called 'gas') is the substance that makes air conditioning possible. It circulates between the indoor and outdoor unit, absorbing heat from inside your home and releasing it outside. If your system loses refrigerant through a leak, cooling performance drops significantly. Here's how to tell if your air conditioner needs regassing.
What Does Regassing Actually Mean?
Contrary to common belief, air conditioners don't use up refrigerant like a car uses petrol. A properly functioning system will have the same amount of refrigerant for its entire lifespan. If refrigerant is low, it means there is a leak somewhere in the system. Regassing without finding and repairing the leak is a temporary fix that will need to be repeated — which is why any reputable technician will check for and repair leaks before topping up the gas.
Signs Your Air Conditioner May Need Regassing
1. It's Not Cooling as Well as It Used To
The most common symptom of low refrigerant is reduced cooling capacity. If your system seems to be running but the room isn't getting as cold as it should — especially on hot days — low refrigerant is a common cause.
2. The Indoor Unit Is Blowing Warm Air
If the air coming out of your indoor unit is at or near room temperature (not cool) even though the system is set to a cooling mode and the compressor is running outside, the refrigerant level may be critically low.
3. Ice Forming on the Outdoor Unit or Refrigerant Lines
When refrigerant pressure drops due to a leak, the temperature in the evaporator coil can drop below freezing. Moisture in the air condenses and freezes on the coil or refrigerant lines. If you see ice on the outdoor unit or on the copper pipes connecting indoor and outdoor units, this is a warning sign of low refrigerant.
4. Hissing or Bubbling Sounds
A refrigerant leak can sometimes produce a hissing or bubbling sound from the indoor or outdoor unit. If you hear an unusual hissing noise that wasn't present when the system was new, have it inspected by a licensed technician.
5. Water Leaking Inside from the Indoor Unit
When the evaporator coil freezes due to low refrigerant, it eventually thaws during off-cycles and produces excess water that the condensate drain can't handle. This can appear as water dripping or pooling inside the room from the indoor unit.
6. Higher Than Normal Electricity Bills
A system with low refrigerant has to work much harder and run for much longer to achieve the same cooling result. This shows up as noticeably higher electricity bills.
What to Do If You Suspect a Refrigerant Leak
Refrigerant handling in Australia is strictly regulated — only licensed refrigerant handling technicians (holding an ARC licence) are legally permitted to handle refrigerants. Do not attempt to regas an air conditioner yourself.
Contact a licensed air conditioning technician who will:
- Measure the refrigerant pressure in your system
- Use electronic leak detection to find any leaks
- Repair the leak before adding refrigerant
- Regas to the manufacturer's specified level
How Much Does Regassing Cost?
Regassing typically costs $150–$350 for a standard split system in Sydney, depending on the type and amount of refrigerant needed and whether a repair is also required. If the leak is in a critical component such as the condenser coil or compressor, the repair cost may exceed the value of the unit — in which case replacement makes more sense.
When to Replace Instead of Repair
If your system is more than 10 years old and needs regassing, it's worth getting a quote on a replacement unit before committing to repairs. Oceania Appliances stocks a range of quality ex-display and graded split system air conditioners with free delivery across Sydney.