LG Air Conditioner Noise Problems [Solved]

LG air conditioner noise problems can be frustrating, though your air conditioner can still function well with the noise. This article discusses the noise problems and possible solutions.

LG ir conditioner noise problems

LG Air Conditioner Noise Problems – How to Fix

Some moving parts of an LG air conditioner can become noisy with constant use, especially those with motors. The same is true for all types of air conditioning systems. The following are parts that may be causing the noise from the unit and how to fix them:

1. Fans

Check the condenser or exhaust fan and the blower. You will find the blower in the air handler, which is the inside unit. The other fan is the one that cools the condenser coil. If the fan blades are dirty, bent, or damaged in any way, they are likely to become noisy. The same applies if the motors have loose parts or are faulty.

Therefore, inspect the fans, both inside and outside, and clean the blades if they are significantly dirty. Also, clean the motor if there is an accumulation of dirt, especially the motor of the fan in the outside unit. Ensure no object is making contact with the blades and creating noise, and the blades are not bent. If they are, they may be touching the housing and generating noise. The only fix is to replace them.

Excessive use of the fan motors can wear the bearings out and cause a loud noise. This is especially true for a window or through-the-wall air conditioner that uses a single motor for dual purposes. A window or wall air conditioner typically uses a dual shaft fan with one blade attached to either side of the motor; one draws air into the unit while the other blows hot air out. Consider replacing the motor if it has worn bearings and has become noisy.

In addition, check the blower wheel as it may be causing the noise. If the motor becomes defective, the blower wheel tends to generate noise that gets louder the longer you use the air conditioner. Check the blower wheel and motor for faults and remove them if they are faulty.

2. Spring Clamp

If your air conditioner is the type that uses a dual shaft fan, it means the motor has a blade attached to either side of the shaft. The blades attach to the shaft using a spring clamp. While the clamp is usually strong and lasts a long time, it will weaken the longer you use the air conditioner. 

Sometimes, the clamp weakens or gets damaged and can no longer hold the blades to the shaft. As a result, the blades will shake, generating a loud noise through the vibration. Therefore, check the blades, and if they are fine, the clamp and fan blade hub may be the source of the noise. Replace both parts if necessary.

3. Compressor

An old or worn-out compressor causes a loud noise. Typically, you can hear the low hum of the compressor as the air conditioner starts and runs. But as it ages, the noise may get louder. The same applies if the compressor runs constantly or overheats; it wears out too quickly that way. If nothing else seems to be causing the noise, check the compressor. 

However, do not replace it if it generates noise, as a noisy compressor can still serve you for a long time. But if you want a new one, hire a licensed HVAC technician to check and replace the part.

LG Air Conditioner Has A Noisy Compressor – Quick Fix

If you hear a loud noise from your LG air conditioner, your first check should be the fans. They are the most likely to become noisy because of dirt or objects caught in the blades and motors. But if the noise comes from the compressor, it may indicate that it is wearing out or is faulty.

You may want to hire a professional to test the compressor and determine whether or not you need a replacement. If the compressor is still in good working condition and can still serve for some years, it is best to continue using it. However, you can try to muffle the noise coming from it.

Buy a compressor blanket from any hardware store around you and hire a technician to install it. Another option is to build a small fence around the condensing unit outside the house, which is where you have the compressor. It should rise slightly higher than the unit, but there should be a few inches of space between the condenser and fence for proper air circulation. 

A third option is to plant a shrub around the unit. This option may take some time, but it also creates beauty around your home. As with the fence, the shrub should be a little higher than the unit and have some space between the condenser and shrub. The only downside is that it may constantly load the condenser with leaves and other debris.

Check out these other articles…

LG Air Conditioner WiFi [Problems & Solutions]

LG Air Conditioner Timer [How to, Issues & Solutions]

LG Air Conditioner Fan [Problems & Solutions]

How to Remove an LG Air Conditioner…[Detailed Guide]

Air Conditioner Condenser [Guide, Problems & Solutions]

Air Conditioner Capacitor [Guide, Problems & Solutions]

Air Conditioner Control [Detailed Guide, Issues & Solutions]

LG Air Conditioner Making a Rattling Noise – Solved

A rattling noise from your LG air conditioner may be from loose parts such as fan blades, spring clamps, or even the compressor. The noise may indicate that your air conditioner is old and has parts that are starting to come loose.

Check the air filter and clean it if necessary. You may also want to determine whether or not it needs a replacement. Next, check the condenser coil; dirt on the coil can cause several issues, including the compressor. Use a leaf blower to clear debris from the coil, and if necessary, clean it further using a garden hose. Tread carefully around the fins to avoid damaging them.

Also, check other bolts and screws to see which may be loosening and which you can tighten. If necessary, employ the services of an HVAC technician for a more professional repair. You may have to check the holding springs and screws for the compressor while checking the unit.

Vibration Coming from an LG Air Conditioner – Quick Fix

Check the fan motor or blower wheel. Also, check the compressor. If the blower wheel or fan motor is loose, it may be hitting the sides of the fan housing and creating a vibration. And if the compressor is loose on the springs or screws, it will vibrate when it starts and shuts off because of imbalance. It may also mean these parts are no longer functioning as they should.

The best repair in this situation is to contact the LG Service Center to report the issue and request service. This is especially needed if you have an active warranty or live in a primarily hot area. The air conditioner may need immediate servicing and cleaning for optimum functionality.

LG Air Conditioner Making Noise When Off – Quick Fix

The most probable cause of this issue is that some parts need a longer time than others to settle when you turn the air conditioner off. Also, it may stem from objects blocking the way of some components and prolonging the settling time. Additionally, the air conditioner may make noise if it is a new installation and you are shutting it off for the first time.

However, an air conditioner does not make a noise when it is off, at least not as a custom. The compressor stops humming once you shut the unit off, and other parts quickly settle without further noises. There may be an internal problem if your LG air conditioner makes noise after turning it off. Ideally, hire a certified technician to check and fix possible issues.

LG Portable Air Conditioner Making a Buzzing Noise – Solution

A buzzing noise from your LG portable air conditioner may mean there are loose parts. When the blades of the fan are loose on the motor shaft, they clang on other parts. Also, check the blower and clean it if it is dirty.

The air filters may need cleaning or changing, and the condenser coils may need a thorough cleaning. The blower may be unbalanced or damaged, or there may be a refrigerant leak. In general, buzzing noise from your air conditioner is not a good sign, whether or not it is a portable unit. But the source of the noise may not be anything serious. However, get professional advice on the noise so you know the next best step.

A refrigerant leak is a more serious problem and will need an HVAC technician to check for leaks and recharge the unit. A reduction in cooling is one tell-tale sign of a leak, as well as an increase in electricity bills. The cooling coil will freeze, along with other parts, and this may cause buzzing. Ensure you properly ventilate your home if you suspect a refrigerant leak, turn the air conditioner, and call for professional help.

LG Air Conditioner Making a Humming Noise – What to Do

Check electrical connections and wiring if your LG air conditioner starts humming all of a sudden. There may also be loose wiring or a problem with the compressor. Typically, the compressor quietly hums as it operates normally. Humming and buzzing noises tend to sound the same unless they become excessively loud. Contact the LG Service Center for further assistance or hire a certified HVAC technician for additional support.

LG Portable Air Conditioner Making a Clicking Noise – Solved

Check the start relay of the compressor if you hear a clicking noise from your LG portable air conditioner. Run a continuity test on the relay using a multimeter to check for continuity. If there is no continuity, replace the relay. It is an easy fix; buy a replacement, pull the old one out and fix the new one in its place.

The noise may also come from a failing thermostat, run capacitor, or control board. Ensure the thermostat is in good working condition and the capacitor is not leaking fluid or bulging. Also, it must show continuity if it is working well. Otherwise, replace it. In addition, check the control board; there may be faulty parts attached to it or the board may be damaged. A service technician is in the best position to test these parts and replace them if necessary.

LG Portable Air Conditioner Making a Whistling Noise – Quick Fix

Whistling noise from your LG portable air conditioner indicates that the ductwork and return vents are not getting enough air through them. These vents are the ones through which air gets into the air conditioner for cooling. You may also hear the same high-pitched whistling if the air supply vents, the ones through which cool air enters the room, do not have enough flow of air.

Therefore, check the vents to see that they are fully open, as well as the dampers if available. Also, all doors and windows should be shut to allow for proper cooling. You may want to check that nothing is blocking the vents, especially furniture. In addition, check to see if it is time to clean or replace the filter.

Finally, inspect the ductwork. Ensure it is correctly installed and is not leaking. Otherwise, air will leak out before it can reach the air conditioner or the room, causing an insufficient amount. Hire a technician to inspect it and determine whether or not it needs fixing.

How to Disable Sound on LG Air Conditioner

If your LG air conditioner is noisy, it is best to find the source of the noise to stop it. Check the fan blades, motors, blower wheel, compressor, bolts, and screws. You will not only be fixing the sound, but also the entire unit and its functionality. This is especially true if the compressor is generating noise; it means it may be faulty and may cause a reduction in the unit’s cooling capacity.

However, if you want to stop all noise from the air conditioner, you can put electrical tape over the speaker on the printed circuit board (PCB). The tape will muffle the sound and make it less audible. You can also install a switch inline to cut the sound from time to time. Another option is to remove the air conditioner speaker from the control board.

LG Air Conditioner Makes a Loud Noise When Starting – What to Do

Check the fan housing, fan blades, and compressor if your LG air conditioner makes a loud noise when starting. These are the parts that engage first when the air conditioner is starting. The bearings of the fan motors may be worn, making the motors unable to run smoothly. 

Also, the blades may be loose on the motor shafts, causing them to hit the housing and create noise. Additionally, the compressor may be failing or have a loose part. It is best to hire an HVAC technician to troubleshoot these parts, find the faulty one, and fix it.

Note: All the troubleshooting and repair steps in this article apply to all types of LG air conditioners, including portable and split units.


Troubleshooting LG air conditioner noise problems is typically not difficult. A few parts are likely to generate noise: fan motor, fan blades, blower wheel, compressor, and even the vents when they are closed or blocked. And fixing most of these problems is easy unless you have a faulty compressor.

If you are unsure how to fix the problem or the noise problem is a recurring one, it is crucial to contact LG Support Center, report the issue, and request service. Alternatively, use the services of a certified and professional technician to repair faulty parts.

Leave a Comment