In Singapore’s hot, humid weather, your aircon works hard to keep your home cool.
However, if your aircon isn’t performing well, the compressor could be the problem.
But how do you know if it’s faulty?
In this article, we’ll show you the telltale signs of a bad aircon compressor and what you should do when you spot them.
What Does an Aircon Compressor Do?
First of all, it’s important to understand what your aircon compressor actually does.
It acts like the heart of your aircon system, circulating refrigerant to cool your room.
In other words, if the compressor stops working, your aircon won’t be able to produce cool air — no matter how high you turn the settings.
Common Signs of a Faulty Aircon Compressor

Weak or No Cold Air
Firstly, if your aircon is blowing warm or weak air even though the settings are correct, the compressor might be having trouble.
When it can’t compress the refrigerant properly, your room won’t cool effectively.
Unusual Noises from the Outdoor Unit
Next, listen for strange sounds from the outdoor condenser unit.
For example, a faulty compressor often makes rattling, grinding, or clicking noises as it struggles to run.
This is a clear sign something isn’t right and needs attention.
Aircon Tripping the Circuit Breaker
Another warning sign is when your aircon frequently trips your circuit breaker.
This happens because a failing compressor draws too much electricity, causing your power supply to cut off for safety.
Outdoor Unit Vibrating Too Much
In addition, check your outdoor unit when the aircon is running.
Excessive shaking or vibrating usually means the compressor is under stress and could fail soon.
Higher Electricity Bills
Lastly, a faulty compressor uses more power to try and maintain the temperature.
As a result, you might notice your electricity bills suddenly going up without any increase in usage
What Should You Do If You Notice These Signs?
In conclusion, if you spot any of these issues, it’s best to get your aircon checked by a professional right away.
Delaying repairs can cause further damage and lead to more costly fixes later.
At Lion City Air Conditioner Services PTE LTD, our experienced technicians can diagnose and repair faulty compressors quickly and affordably.
We’re here to help you stay cool and comfortable all year round.
📞 Call us today at +65 8818 5781
🌐 Book your service at lioncityaircon.sg