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Common Problems

Why is Your Aircon Compressor Noisy and How to Fix It

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A noisy aircon compressor is often the source of loud and grating noises. Whether it’s the noise of constant banging to incessant chattering and rattling, these sounds are always impossible to miss. Most of the time the problems behind these noises are easily repairable. But in some cases, it can also indicate a bigger problem within the unit or more aircon problems that only an aircon professional can fix.


In this article, we look at the possible reasons behind common aircon compressor noises and what you can do to troubleshoot and fix the issue.


8 Common Sounds of a Noisy Aircon Compressor

1. Banging Noise

A popular aircon compressor noise can be heard in the form of loud banging sounds. If your unit happens to suffer from this annoying problem, try checking or a loose part such as a dislodged piston pin, a wobbly crank shaft or internal mount. If it’s not any of these problems, then it can be an aircon compressor that needs immediate replacing.

2. Chattering or Rattling Noise

If you’re experiencing chattering or rattling noises and it’s not because of a four-legged animal, then your compressor may be at fault. This air con compressor noise is usually due to loose parts, rattling internal tubes or high and wrong refrigerant levels. For these issues, contact an expert right away.

3. Humming Noise


For humming noises in the compressor, check for fan-related issues. A lot of cases behind this sound normally take shape in the form of dirty and misaligned fans. To fix the issue, simply clean and realign the fan blades and give it another go. If the problem still persists, it can be due to a busted fan motor or a faulty starting capacitor.


4. Buzzing Noise


Buzzing noises in your compressor unit that aren’t caused by bees nearby can indicate a problem with the wiring, electrical component or the motor itself. However, these three common causes are prone to fires and require a more complicated process of repairs. For your safety, it’s best to let a professional deal with the problem.


5. Hissing Noise


If the aircon compressor is making hissing noises, make sure to immediately check for any sign of internal clogging inside the unit. You can then fix the problem yourself by removing the debris causing the blockage. For other causes such as refrigerant leaks or damaged refrigerant valves, call an expert right away.


6. Clicking Noise

Any constant clicking in an aircon compressor unit can be due to loose pieces inside the system or a dirty fan. To troubleshoot the issue, simply check and tighten any loose parts and give the fan some cleaning. If the issue still persists, consider contacting an aircon professional right away to diagnose and repair the noise.

7. Squealing Noise


Squealing noises are always caused by one major reason: a motor problem. This could either be the fan or the  compressor motor running on its last legs and resulting in high-pitched squeals within the unit. If this is the case, it’s probably time for you to get a new unit.


8. Screaming Noise


If your aircon is prone to emitting screams in the middle of the night, consider it as a cry for help — literally and figuratively. Oftentimes, it can be due to intense internal pressure inside the unit or blockages inside the system. If you start experiencing this, contact a professional right away to diagnose and fix the problem.


Say Goodbye to Noisy Aircon Compressors

Taking the time to diagnose and solve the problem behind any of these common aircon compressor noises is a good way to keep your unit in its tip-top shape. However, for bigger problems such as busted wiring, refrigerant leaks and faulty electrical parts, always make the decision to seek a professional aircon servicing company.


For aircon repair and maintenance, give us a call here at Luce Aircon! From general servicing to the full range of aircon repairs, our team of aircon experts and technicians are here to help you solve your aircon woes in one appointment.

Read another common aircon problem: Why is Your Aircon Status Light Blinking and How to Fix It
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Staff Writer

Staff Writer

This article is written by our passionate staff writers who seek to share our knowledge from our business

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