Common Aircon Problems
Start from what you notice. Each page covers the cause, how urgent it is, and what to check first.
Where to start
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Find your symptom
Enter a symptom or open a group below.
Cooling16 pages
- Why is my aircon blowing air but not cooling the room?
- Why is one room not cooling when the others are fine?
- Why is ice forming on my aircon pipe or copper line?
- Why does my aircon go cold then warm again in cycles?
- Why is my aircon less cold after servicing than before?
- Why does my room feel humid with the aircon on?
- Why is my aircon outdoor fan running but not cooling?
- Why is my aircon taking too long to cool the room?
- Why does my aircon cool at night but not the afternoon?
- Why does my aircon cool unevenly across the same room?
- Why is my aircon outdoor unit too hot to touch?
- Why does my aircon lose cooling when two rooms are on?
- Why does my aircon lose cooling weeks after a gas top-up?
- Why is my aircon getting weaker despite regular servicing?
- Why has my new aircon never been cold since installation?
- Why did one room stop cooling after my renovation?
Water and leaks8 pages
- Why is my aircon leaking water from the indoor unit?
- Why is water dripping from my aircon outdoor pipe?
- Why is my aircon pipe sweating and dripping condensation?
- Why does my aircon leak water only when it is raining?
- Why is my aircon leaking water right after servicing?
- Why is my aircon leaking again after the drain was cleared?
- Why does my aircon drip water only on humid or rainy days?
- Why is water leaking from my aircon trunking or casing?
Power and trips16 pages
- Why won't my aircon turn on when the power is still on?
- Why does my aircon keep switching itself off on its own?
- Why is my aircon light flashing, and what is it saying?
- Why does my aircon keep tripping the breaker?
- Why does my aircon smell like burning or hot plastic?
- Why is my aircon outdoor unit not running or starting?
- Why is my aircon beeping when nobody touched the remote?
- Why does my aircon trip when multiple units are on?
- Why does one aircon unit trip the whole system?
- Why does my aircon restart after a power fluctuation?
- Why did my aircon start faulting right after renovation?
- Why does my aircon breaker trip only after heavy rain?
- Why did all my aircon units stop working at the same time?
- Why won't my aircon turn on again after a service visit?
- Why did my aircon start tripping after a service visit?
- Why does my aircon struggle to start on hot afternoons?
Airflow and controls8 pages
- Why is my aircon airflow weak even on the highest fan?
- Why is there no airflow at all from my aircon vents?
- Why is my aircon remote not responding to any button?
- Why has my aircon louvre stopped moving or swinging?
- Why does my aircon fan speed not change when I set it?
- Why is my aircon not responding to the app or WiFi?
- Why does my aircon fan keep running after turning off?
- Why does my aircon smell or feel weaker after the haze?
Noise10 pages
- Why is my aircon outdoor unit noisy at night?
- Why is my aircon indoor unit suddenly so much louder?
- Why is my aircon making a clicking or ticking noise?
- Why is my aircon vibrating, and where is it coming from?
- Why is my aircon indoor unit making a gurgling noise?
- Why is my aircon hissing or whistling while running?
- Why does my aircon outdoor unit rattle only when windy?
- Why is my aircon noisy only when it first starts up?
- Why is my aircon noisy only at certain fan speeds?
- Why is my aircon noisier or weaker after servicing?
Smell6 pages
- Why does my aircon smell only when it first starts up?
- Why does my aircon smell like burning or hot plastic?
- Why does my aircon still smell after cleaning?
- Why does my room feel humid with the aircon on?
- Why is my aircon blowing mist or fog from the vents?
- Why does my aircon smell or feel weaker after the haze?
After a service or install9 pages
- Why is my aircon less cold after servicing than before?
- Why does my aircon still smell after cleaning?
- Why is my aircon leaking water right after servicing?
- Why has my new aircon never been cold since installation?
- Why did one room stop cooling after my renovation?
- Why did my aircon start faulting right after renovation?
- Why is my aircon noisier or weaker after servicing?
- Why won't my aircon turn on again after a service visit?
- Why did my aircon start tripping after a service visit?