1. Loose parts
Panels, screws and brackets loosen over time and rattle when the fan runs.
How we fix itTighten and secure partsAircon servicing from $54.50 →
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Why Is My Aircon Making Noise?
Every noise points to a different problem. Listen to what it sounds like and where it comes from, then use the table below.
The short answer
Most aircon noises come from a dirty or unbalanced blower, loose parts, or a worn fan motor. Buzzing or clicking from the outdoor unit can mean an electrical fault. A short video of the noise helps us find the cause quickly.
Quick diagnosis: what is your aircon doing?
| What you notice | Likely cause | Fix | Cost |
|---|---|---|---|
| Rattling from the indoor unit | Loose panel or screws | Tighten during servicing | from $54.50 |
| Whirring or wobbling sound | Dirty or unbalanced blower wheel | Chemical overhaul | from $150 |
| High-pitched squealing | Worn fan motor bearing | Motor repair | $80 diagnosis* |
| Buzzing from the outdoor unit | Capacitor or contactor fault | Repair after diagnosis | $80 diagnosis* |
| Gurgling or water sounds | Blocked drain or low gas | Servicing or gas check | from $54.50 |
Prices before GST. *On-site diagnosis is $80 for a split system and is waived when you book the repair.
5 common aircon noises, and how to fix each
2. Dirty or unbalanced blower
Dirt builds up unevenly on the blower wheel, so it wobbles and whirs.
How we fix itBlower dismantle and washChemical overhaul from $150 →
3. Worn fan motor
A worn bearing makes a squealing or grinding noise that gets louder over time.
How we fix itMotor repair or replacementAircon repair: $80 diagnosis →
4. Electrical fault
Buzzing or repeated clicking from the outdoor unit can mean a failing capacitor or contactor.
How we fix itDiagnosis and part replacementAircon repair: $80 diagnosis →
5. Drainage or gas issues
Gurgling can come from a blocked drain or air in the refrigerant lines.
How we fix itDrain flush or gas checkAircon servicing from $54.50 →
What you can check yourself
- Find the source: indoor or outdoor unit.
- Check the front panel is clipped in properly.
- Clear leaves and debris around the outdoor unit.
- Clean the filter and see if the noise changes.
- Record a short video of the noise to send us.
If you hear grinding or smell burning, switch the aircon off at the isolator.
Aircon making noise: FAQs
How much does it cost to fix a noisy aircon?
At JL Aircond, loose parts are usually fixed during general servicing from $54.50. If a motor or part needs replacing, the $80 diagnosis fee is waived when you book the repair.
Is a noisy aircon dangerous?
Most noises aren't dangerous, but buzzing, grinding or burning smells can mean an electrical or motor fault that should be checked soon.
Why is my outdoor unit so loud?
A loud outdoor unit often has a worn fan motor, loose parts or a failing compressor part. Have it checked before it breaks down.
Is some aircon noise normal?
Yes. A soft hum and a click when it starts or stops are normal. Rattling, squealing and loud buzzing are not.
Aircon still noisy? We'll find the cause.
Send us a short video of the noise on WhatsApp. We'll tell you the likely cause and give you a quote.