How To Repair A Noisy Aircon

How To Repair A Noisy Aircon?

Having to deal with a noisy Aircon can be a frustrating affair and often a sign of a serious problem. For this reason, if your air conditioner is making noises, it is highly important to locate and fix the problem as soon as possible. Below are different problems that could cause an air conditioner to produce noise and ways you can solve the problem.

1. A Noisy Fan

If your heating and cooling unit is producing a loud rattling noise, then the chances are it could be the fan. Before jumping to the conclusion, it is wise to confirm this theory. You can only achieve this by locating and confirming that the fan is the culprit.  The good news is that they can be found easily the moment you open the unit’s cabinet.
Accumulation of dirt and debris is the main reason why a fan will start to produce a sound. However, if there is no debris, you should not automatically rule out the fan. The fan blades may be loose and rubbing against something while rotating.


It is important to clean and maintain the fan very well to prevent this issue. Of course, if the fan is dirty it will not function as needed. The accumulation of dirt and debris could be what is causing the buzzing or humming noise, which does affect its performance. Therefore, if dirt is the problem make sure that you have cleaned it.
If the problem is not dirt but a loose blade, do not worry because it is very easy to fix this problem. All you need is a screwdriver to tighten the screws holding the blade. Also, do not forget to inspect the blades to see if they are bent or damaged. If they are bent, all you have to do is straighten them by hand.

2. Loose Screws

Anytime when a heating and cooling unit is running, it vibrates. For this reason, when it begins to rattle, it can be a sign of loose screws. This is a very common problem that can be fixed easily. The screws loosen with time due to the vibrations.
How do you locate loose screws? Well, the first thing to do is to check the screws in the panel of the unit. Here’s why: these screws have a high probability of coming loose.

The solution

The solution is very simple and only needs a screwdriver. However, before you begin screwing the screws, risk prevention is highly important. For this reason, it is highly important to first turn OFF the unit before getting to work. After completing the task, turn on the unit and listen to if the problem has been resolved.

3. Moving Parts Friction

The heating and cooling unit have several moving parts, such as the fan. Whenever there is friction, surely there will be sound, heat, and unusual wear and tear. Lubrication is the only way to prevent this problem.


The only way to solve this problem is by lubricating all moving parts. Lubrication is a task that must be done periodically to prevent friction-related problems. It will not only help eliminate noise but also protect all moving parts from wear and tear.

With this in mind, you must take caution regarding the type of lubricant you use. The best and recommended lubricant oil to use is the SAE 10 oil. If this is not an option, consult your unit’s manufactures.

4. Clogged Coil Fins

Clogged coil fins is a common problem known to cause the unit to be noisy and highly affects its efficiency. This is a problem you can tackle without the help of a professional.


To solve this problem, vacuum using a brush attachment to loosen and clear dirt and debris. While at it, do not forget to inspect the coil fins closely. If any of the fins are bent, consider straightening them out. This is a solution that helps eliminate the humming sound that is coming from the air conditioner.

5. Loose Parts

The fan blades and screws are not the only parts that can come loose with time. Due to vibrations, parts can become loose and even out of balance. Loose parts produce a clacking sound rather than a harming sound. Therefore, whenever your unit is producing a clucking sound, chances are you have a loose part.


To prevent expensive part replacement or repairs, it is highly important to act fast as soon as you hear a clucking sound. This is a problem that can either be fixed easily or require the help of a professional. It all depends on the part and damage.

Constantly Check For Debris

Debris can easily get inside the Aircon, especially those with an outdoor unit. The moment debris gets into the unit; it can cause a lot of problems aside from leading to noise production.  You can easily avoid problems related to debris as long as you constantly clean the area around the unit. It is wise to constantly clean and dust the indoor unit, especially if; it is located in places where you do not normally visit, like the loft.

The only way to remove dust and debris is with a vacuum with a brush attachment. Before you begin cleaning, it is highly important to turn it OFF. This is a technique to prevent yourself from being injured.  Remember, prevention is better than cure. You may open the condenser unit and remove leaves and pebbles you see.

Is Running a Noisy AC Risky?

It is not risky for your AC system to run a noisy AC.

The air conditioner compressor creates an unusual noise that can be loud because of its design.

Noise from the sound wave coming from the compressor and not going through the room do not pose any risk to your health as long as it is maintained safely within regulatory levels defined by health authorities.

However, if the noise is too loud, it should be checked immediately. It could mean that loose parts are causing problems, or the heating element might have broken because of faulty wiring. The sound coming from it can also point to different issues around your system, like something rubbing against metal components or an object caught in one of the fan’s blades

How To Fix a Noisy Air Conditioner Cause by Fan?

Fans can get loud when they are covered in dirt and dust. If you don’t lubricate the fan, it will get noisy. And if you don’t clean and service your fan, it can make a lot of noise. Make sure to clean up after yourself, so your house stays quiet!

Here is a guide on how to clean the fans of your air conditioner.

  • With a screwdriver, you can open up the air conditioner cabinet. Inspect all fan blades to ensure they are undamaged and intact. Next, remove any debris that might have accumulated on or around them, such as insulation materials or dust; leaves may also accumulate there sometimes!
  • Next, check if the fan blades are securely attached to their base. A loose fan will shake uncontrollably, cause vibrations in other parts of the unit, and make it sound like there is a rattle inside your AC system! To address this problem, you can use an Allen wrench or screwdriver to tighten any screws that might be loosening on top of those pesky blades.
  • Carefully inspect the fan blades before you install them. The slightest bend on a blade will cause vibrations in your whole unit, and if they touch inside of it, their chances of breaking much higher, but there’s also an increased chance that they may produce squeaking noises. Be gentle with these delicate parts!


Although solving these issues is easy, the chances are you will not be able to take care of these problems on your own. What does this mean? Well, it simply means that at one point, you will need help from a professional. That is because sometimes when an Aircon produces sound, it is a sign that it needs replacement. In some cases, it is a sign that a part is malfunctioning and needs replacement.

Therefore, if you have applied all the techniques or solutions mentioned above, then it is time to call a professional. Professionals are experts in their field and can easily locate the problem. A noisy heating and cooling unit is a problem that can be fixed easily. Do not forget to take preventive maintenance on a regular to avoid such problems.