Quick Answer: Why your aircon is making noise
If your aircon is making noise, it usually means there is a mechanical, airflow, or installation-related issue. In Kuala Lumpur, common causes include loose internal parts, dirty blower fans, vibration from improper mounting, or worn components. Some noises indicate normal wear, while others signal a fault that requires professional aircon repair or correction of the original installation.
Common Aircon Noises & What They Mean
1) Rattling or Vibrating Noise
Rattling sounds usually come from loose panels, screws, or mounting brackets. In some cases, vibration is amplified by wall or ceiling resonance.
- Signs: Noise increases when cooling starts or fan speed changes.
- Root cause: Loose internal parts or unstable installation.
Our solution: Aircon Repair to secure components, or Aircon Installation if mounting or alignment is incorrect.
2) Buzzing or Humming Sound
A buzzing or humming noise often points to electrical load, motor strain, or early component wear.
- Signs: Noise is constant while running, cooling performance may drop.
- Root cause: Fan motor stress, capacitor issues, or electrical vibration.
Our solution: Expert Aircon Repair — diagnosis and correction before damage escalates.
3) Clicking or Ticking Noise
Clicking sounds can occur when internal parts expand and contract, but repeated or loud clicking usually signals a mechanical fault.
- Signs: Clicking at startup or shutdown, irregular operation.
- Root cause: Relay issues, loose fan blades, or worn plastic components.
Our solution: Aircon Repair to inspect and stabilise internal components.
4) Whistling or High-Pitched Air Noise
Whistling noises are usually caused by restricted airflow, often due to dirty filters or internal airflow imbalance.
- Signs: Noise changes with fan speed, airflow feels uneven.
- Root cause: Airflow obstruction or internal dirt buildup.
Our solution: Aircon Repair — airflow correction and internal inspection.
5) Loud Noise Right After Installation
If the aircon starts making noise shortly after installation, the issue is often related to mounting angle, bracket stability, or pipe alignment.
- Signs: Noise appears within days or weeks of installation.
- Root cause: Improper installation or insufficient vibration isolation.
Our solution: Aircon Installation correction to stabilise the unit and eliminate vibration.
Why Noisy Aircons Are Common in Kuala Lumpur
In Kuala Lumpur, air conditioners often run for long hours in humid conditions. Continuous operation accelerates wear on moving parts, while building structures can amplify vibration. Without proper inspection, minor noises can develop into serious mechanical faults.
How Our Technicians Diagnose Aircon Noise Issues
- Noise Type Identification: Rattle, buzz, click, whistle, or vibration.
- Operational Test: Check noise at different fan speeds and modes.
- Mechanical Inspection: Fan, motor, mounting, and internal panels.
- Installation Check: Bracket stability, alignment, and vibration points.
- Corrective Action: Repair or installation correction based on findings.
Aircon noise getting worse?
Book Aircon Repair or Installation Adjustment to fix the noise before it leads to bigger damage.
Real Cases in Kuala Lumpur (Proof of Work)
Mont Kiara (High-End Condominiums)
In Mont Kiara condominiums, aircon noise complaints are often related to
vibration amplified by concrete walls and ceiling structures.
We regularly encounter indoor units that are mechanically fine,
but produce rattling or humming sounds due to slightly loose mounting brackets
or insufficient vibration isolation.
After stabilising the mounting and securing internal panels,
the noise is eliminated without replacing any components.
Petaling Jaya (Mixed Residential & Commercial Areas)
In Petaling Jaya, noisy aircon cases frequently involve
blower fan imbalance and internal wear,
especially in units that run long hours in offices or home workspaces.
During inspection, we often find dust accumulation on the blower,
causing uneven rotation and a noticeable humming or buzzing sound.
Proper repair and internal adjustment restore smooth and quiet operation.
Shah Alam (Landed Homes & Family Residences)
In Shah Alam landed homes, aircon noise is commonly traced to
installation-related issues,
such as improper mounting angle or pipe routing that transfers vibration
directly into the wall structure.
Even newly installed units can become noisy if alignment is slightly off.
Correcting the installation setup and improving vibration damping
resolves the issue and prevents long-term mechanical stress.