Is your aircon shaking, rattling, or making loud vibrating sounds? Here’s what it really means.
When your aircon starts vibrating loudly, it’s more than just annoying — it’s actually a sign that something inside the unit needs attention. And if you ignore it, the vibration can lead to bigger problems such as damaged parts, weak cooling, and higher electricity bills.
In this guide, you’ll learn why aircon vibration happens, what causes it, and how you can fix it safely — without putting your system at risk.
1. Loose or Worn-Out Parts
First of all, loose screws, brackets, or panels are one of the most common causes of vibration.
Over time, your aircon naturally experiences wear and tear. As a result, its parts may loosen and start shaking during operation.
Signs to look for:
Rattling sounds
A shaking indoor or outdoor unit
Vibrations that get louder with higher fan speeds
Safe fix:
Tighten the loose screws or panels. However, if the vibration continues, it’s best to get a technician to check internal parts.
2. Fan Motor Issues
Another major cause is a faulty or unbalanced fan motor. When dust, dirt, or damage affects the fan blades, the motor struggles to spin smoothly.
This leads to strong vibrations — especially when the settings are on high.
Safe fix:
Avoid touching the fan blades yourself. Instead, call a technician to clean or realign the fan safely.
3. Dirty or Clogged Components
Additionally, dust buildup inside the indoor or outdoor unit can create imbalance.
When dirt collects on the blower wheel or fan blade, the aircon becomes unstable and vibrates more than usual.
Safe fix:
Regular servicing and chemical cleaning remove dirt and restore balance. This is the safest and most effective way to stop vibration caused by grime.
4. Poor Installation or Wrong Positioning
Sometimes, the problem starts from the beginning.
If your aircon wasn’t installed properly — or if it’s mounted on an uneven or weak surface — vibration becomes almost unavoidable.
Outdoor compressors placed on unstable brackets or wooden shelves are especially prone to shaking.
Safe fix:
Re-mount the unit on a proper bracket or platform. A professional can also check alignment and secure the installation.
5. Refrigerant (Gas) Issues
Low gas can cause your aircon to work harder than it should.
Consequently, the unit may vibrate or make unusual noises while trying to cool your room.
Safe fix:
Get a proper diagnostic check. If needed, the technician will top up the gas and inspect the cooling system for leaks.
6. Worn-Out Compressor
Finally, older compressors naturally become noisier.
When the internal components wear down, the compressor may vibrate excessively — especially during startup.
Safe fix:
A technician must evaluate the compressor. In some cases, repair is possible; in older systems, replacement might be more cost-effective.
How to Prevent Aircon Vibration Problems
Here are some practical ways to keep your aircon stable and running smoothly:
✔ Schedule regular servicing
✔ Clean the filters every 2–4 weeks
✔ Avoid placing the outdoor unit on weak brackets
✔ Ensure the aircon is mounted professionally
✔ Fix minor issues early before they get worse
With these simple steps, your aircon stays quieter, cooler, and safer — giving you better comfort and fewer breakdowns.
📞 Book Your Aircon Service Today
At Lion City Air Conditioner Services, we inspect, troubleshoot, and repair all types of aircon vibration issues — safely and professionally.
Whether it’s loose parts, fan problems, or compressor issues, our team ensures your aircon works smoothly and quietly.
📞 Call +65 8818 5781
🌐 Book online at lioncityaircon.sg
With the right care, your aircon will run quietly, efficiently, and safely again.
