Why My AC makes noise, and what does that mean?

Today, we might not find any house without an air conditioner. These air conditioners have become the basic necessity of a person’s life. But, when the air conditioner is running, people like it to be quiet without making a lot of noise. Why the AC should be running quietly is because most people switch on the ac when they are sleeping and they prefer it to be quiet. Also, when the summer heat starts people like to chill by switching on their air conditioner. If the AC makes a noise then it will disturb people’s sleep and calm. It is also a lot more annoying. 

There are various reasons why an AC makes noise and you should take these noises seriously because otherwise, it may lead to greater damage to your air conditioner. The loud noises usually mean that there is something seriously wrong with your air conditioner and you should get it checked by a professional that handles the air conditioner. Here are the various reasons why AC makes noise and how to fix it. Ignoring the noises from the AC will only make it worst and you may end up paying a lot more for the repair as compared to the actual cost of AC.

Why AC makes noise?

Why My AC makes noise, and what does that mean? 1

Here is the list of sounds that your Air-conditioner or HVAC system might be making and why do they make it. 

  • Banging
  • Clanking
  • Clicking 
  • Buzzing
  • Hissing
  • Squealing
  • Humming
  • Chattering
  • Whistling noise
  • Gurgling noise 

Banging noise

If you hear a banging noise from your ac then, the problem might be with your compressor. The compressor is the outdoor unit that helps in circulating refrigerant that helps in circulating cool air inside your room. Due to normal wear and tear the parts in your compressor can get damaged. But, a normal technician can’t repair it. And hence, you may need to purchase a new air conditioner. But, you can also check with your AC manufacturing company whether the compressor is covered under the warranty. 

Clanking noise

Clanking noise in the air conditioner also means that something is wrong with your air conditioner. Either some part is loose or out of order. It can also mean that inner parts or the blades of the outdoor unit fan are imbalanced and hitting other parts. It also means that the parts inside the sealed unit are damaged and may need replacement. 

Clicking noise

Sometimes you may hear a clicking sound when your ac is running or when you start the ac. If you hear the clicking sound when you start the ac, and if your ac does not start, then there might be some electrical issue with the main unit, compressor, or capacitor. If you hear a clicking noise while the ac is running, then some small object has entered the blower fan of the main unit. The object hits the fan as it spins. If some small object has entered the main unit, then, it can be easily taken out. 

Buzzing sound

Sometimes, when your ac starts making a buzzing sound then you should realize that your ac has started malfunctioning.  All the parts of the air conditioner work together to make the machine work. But, if you start hearing a buzzing sound, that means there is a problem with the parts of the machine. Either one of the parts is broken, there may be loose parts, or the refrigerant starts leaking from the compressor. If one of the parts does not work properly, then it will put a lot more stress on other parts of the air conditioner, and damage it completely. Your machine will start making a buzzing sound that indicates that it needs repair soon. 

Squealing sound

When you hear a squealing high pitched sound coming from your AC, then the issue is usually with the belt connecting the motor with the blower, or with the ball bearings on the condenser fan’s motor. If the belt connecting the motor with the blower has slipped then you will hear a squealing sound. But, this belt was in the older ac units. 

Most new air conditioning systems do not have a belt. If your air conditioner is old, then this is the problem that you are facing and you may need to replace the connecting belt. The new units have direct-drive motors without the belt that pulls air directly across the condenser fan into your compressor unit, and hence it is possible that the issue in the new unit is with the ball bearings on the condenser fan’s motor. It may make a squealing or grinding sound that indicates that you need to replace the motor.

Humming sound

The humming sound coming from your ac generally is not very serious, but, still, you should pay attention to it. Loose parts and refrigerant leakage may cause vibration and lead to more serious problems. Sometimes, the humming sound indicates that there is an electrical problem in the air conditioner unit. When the compressor is humming and does not start, then there might be an issue with the motor of the air conditioner. This noise can also be triggered by loose wiring. 

Chattering sound

There are various reasons why you can hear a chattering noise in your air conditioner. It may mean that your air conditioner is becoming old and is starting to deteriorate. Twigs or leaves also might have clogged your system and may be making the weird sound. In the system there is an electrical contractor which can also make the weird sound and damage other parts of the machine including the compressor. Another thing that can cause the chattering sound is the fan, that can make weird sounds when it becomes loose. Loose screws or bolts can also cause rattling sound. 

Whistling noise

At some point of time, you may start hearing high pitched whistling noise. This should not be ignored at all as it means that there is a refrigerant leakage somewhere in the system, which needs to be corrected immediately by the technician. 

Gurgling noise

When you hear a gurgling sound while the ac is running means that the drain line through which the wastewater goes out is clogged or cracked. If you want you can switch off the system and then inspect the drain line your self or get it checked by the technician.

So, the ac makes noise due to various reasons and you should definitely get it checked by the technician without delay.

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