Leak repairs
Air Conditioner Leak Repairs
Water dripping from the indoor unit, or a system losing its gas? We find the source of the leak, fix it properly and test the system before we leave.
5.0 from 292 Google reviews
Leak repairs
What does an air conditioner leak repair include?
Finding the cause, fixing it and testing the result. For water leaks that usually means clearing or re-running the condensate drain, cleaning the coil and tray, or replacing a damaged tray or pump. For refrigerant leaks it means locating the leak, repairing it, and pressure testing and recharging the system.
A small leak is easy to ignore, but water in a ceiling or wall can cause stains, mould and damaged plaster, and a slow refrigerant leak can end in a failed compressor. Fixing it early protects your home and your system and gets your air conditioner back to full efficiency.
There are two kinds of leak, and they need different fixes:
- Water leaks: water dripping or running from the indoor unit, usually from a blocked or damaged drain.
- Refrigerant (gas) leaks: refrigerant escaping from the pipework or coils, so the system stops cooling properly.
Causes
What are the common causes of a leaking air conditioner?
A blocked condensate drain line is the most common cause. Others are a dirty or frozen indoor coil, an indoor unit that was not installed level or with enough drain fall, a cracked drain tray, low refrigerant that freezes the coil, and a drain line that is blocked, crushed or disconnected.
Blocked condensate drain
Dust, slime and algae build up in the drain line until water backs up and overflows from the indoor unit. This is the most common cause.
Dirty or frozen indoor coil
A dirty coil or poor airflow can let the coil ice over; when it thaws, more water arrives than the drain tray can handle.
Poor installation
An indoor unit that is not level, or a drain without enough fall, lets water pool and spill instead of draining away.
Cracked or damaged drain tray
Older trays can crack or rust through, so water drips into the ceiling or down the wall.
Low refrigerant
A refrigerant leak lowers the pressure, which can freeze the coil and cause water leaks as it melts.
Blocked or disconnected drain line
A drain pipe that is crushed, blocked by a wasp nest or knocked loose sends water where it should not go.
How we fix it
How do you repair an aircon leak?
In five steps: a thorough inspection, pinpointing the leak, the repair itself, cleaning and maintenance so it does not come back, and a final test. If parts are needed, such as a drain tray, condensate pump or a section of pipework, we explain and price them before we go ahead.
Thorough inspection
We check the indoor and outdoor units, drain tray, drain line and pipework to find where the water or refrigerant is coming from.
Leak detection
For refrigerant leaks we pressure test the system and check the joints, coils and pipework to pinpoint the exact spot.
Repair
We clear or re-run the drain, replace a damaged tray or pump, repair the refrigerant leak, and recharge the system to the correct level.
Clean and maintain
We clean the coil and drain tray, check the filters and tighten connections, so the leak does not come straight back.
Test
We run the system, confirm the water drains freely and the system is cooling properly before we leave.
Licensed refrigerant work
Who can repair a refrigerant leak?
Only a licensed technician working for a business with a refrigerant trading authorisation. Frost Solutions holds ARCtick authorisation AU064493, and our technicians repair the leak, pressure test the system and recharge it with the correct amount of refrigerant, rather than simply topping it up.
Topping up gas without fixing the leak only delays the problem, and the refrigerant ends up in the atmosphere. We find and repair the leak first. If the leak is in an old, corroded coil, we will tell you whether the repair is worth it or whether a replacement is the better spend.
Don't let a leaking air conditioner disrupt your comfort. Call 1300 101 100 (Monday to Friday 7am–4pm, Saturday and Sunday 9am–4pm) or book a repair.
Good questions
Frequently asked questions
Why is my air conditioner leaking water inside?
Usually a blocked condensate drain. When the system cools, it takes moisture out of the air and drains it away; if the drain is blocked, the water overflows from the indoor unit. A frozen coil, a damaged tray or a unit that is not level can also cause it.
Is it safe to keep using a leaking air conditioner?
Turn it off. Water can damage ceilings, walls and floors, and water near electrical parts is a safety risk. If water is near the electrics, switch the system off at the isolator or circuit breaker and call us.
How do I know if it is a refrigerant leak?
Signs include the system blowing warm air in cooling mode, ice on the pipes or coil, a hissing sound, or oily marks on pipe joints. Refrigerant work must be done by a licensed technician. We hold an ARCtick refrigerant trading authorisation (AU064493).
Can I unblock the drain myself?
You can check the drain outlet outside is clear and not crushed. Clearing the line and tray properly means opening the unit, which is best left to a technician, as part of a service or repair.
Is a leak covered by warranty?
If we installed the system, call us first: our 10-year workmanship guarantee covers the gas charge and call-outs. Warranty details. For systems we did not install, a call-out fee applies to find the fault, and the repair is quoted once we know the cause.
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Learn moreReal words from real clients
Rated 5.0 from 292 Google reviews
Every review below is from our Google Business Profile. Read them all on Google.
5.0 from 292 Google reviews checked 13 Nov 2026- ★★★★★
I have just had a total of 5 aircons fitted up by the boys at Frost. 4x brand new installs to each bedroom, and a new replacement for the lounge. I cannot fault anything. Their communication, punctuality, price and workmanship have all been superb throughout the entire process. Trouble and stress free. Its easy to see why they have so many 5star reviews. True professionals. Thanks again.
Edwin Google review, about Sep 2026
- ★★★★★
Absolutely fantastic experience with Frost Solutions! I recently had a ducted air-conditioning system installed and honestly, from the very first conversation through to the finished installation, the whole process was seamless. ... The installation itself was done to a really high standard, the team worked efficiently and left everything clean and tidy. ... Great people, great communication, great workmanship and a great result.
Grant Google review, about Oct 2026
- ★★★★★
Couldn't recommend Frost Solutions highly enough. We recently had them install a 16kW Daikin ducted system with 8 outlets, 6 independent zones, AirTouch 5, multiple upgrades and a 5 year service plan. ... Another big positive is that Frost Solutions have their own electrical team as part of the installation. ... the entire experience was seamless.
Jordan Google review, about Sep 2026
- ★★★★★
Frost Solutions installed ducted air conditioning in my home today and I couldn't be happier. The team were professional, friendly, punctual, and down to earth. ... left the house spotless ... I also really appreciated the follow-up call from the office later in the day to check I was completely satisfied ... They're a local business with local staff, and the value was extremely competitive for the quality of service and workmanship provided.
Bradley Google review, about Nov 2025
- ★★★★★
From my initial phone call to the pre-check and installation, all correspondence and actions were clear and understandable (for someone who is non tech savvy).. Shout out to Paul (Senior Technician) ... He was also clear when showing me how to use the air-con, and info on future servicing and cleaning when needed. Thanks Frost Solutions Team, I highly recommend you to anyone needing a new aircon :)
Sue Google review, about Jun 2026
- ★★★★★
Wow! Frost Solutions is possibly the best all round company I've worked with for a long time. The admin staff, sales and tradesmen-installers were all very polite, efficient and easy to communicate with. From the time I phoned to organise a quote to the full install was only an about a week ...
Jo Google review, about Nov 2025
Your comfort, our priority.
Air conditioner leaking?
Turn it off, catch the drips and call us. We will find the cause and fix it.