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HomeRepair HelpLG A/C RepairLG Air conditioner is loud or noisy Repair
LG Air conditioner is loud or noisy
If your LG air conditioner is loud or noisy, start by identifying where the sound is coming from and what kind of noise you hear. An air conditioner making noise can often keep running for years if the compressor is simply wearing and getting louder, but compressor replacement is a sealed-system repair that should be handled by a licensed professional. More commonly, an AC making loud noise comes from the dual shaft fan motor as its permanently lubricated bearings break down over time. A damaged fan blade, or one rubbing the housing, can cause an air conditioner rattling or scraping sound, so check the front and rear blades. If the condenser fan motor receives proper voltage but will not run correctly, inspect the capacitor and replace the motor if needed. A worn fan motor can also cause a window air conditioner noisy complaint, especially if the bearings are failing. A loose blower wheel may wobble on the shaft and create vibration or an air conditioner grinding noise. Enter your LG model number on RepairClinic.com to find the exact replacement part for your air conditioner.
01 - LG Air Conditioner Compressor
When the compressor is wearing out, it generates more noise than usual. When this happens, it is not necessary to replace the compressor—compressors often last for years after they become noisy. However, if you would prefer to have a new compressor, have a licensed professional replace it.
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02 - LG Air Conditioner Dual Shaft Fan Motor
The fan motor or dual shaft fan motor has bearings which are usually permanently lubricated. However, over several years, the lubrication will break down, causing the motor to become noisy. If this happens, replace the dual shaft fan motor.
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03 - LG Air Conditioner Fan Blade
Air conditioners have a fan blade in the front and a fan blade in the rear. Check both fan blades for damage. If a fan blade is damaged, or is rubbing against the fan housing, replace it.
Highly Likely
04 - LG Air Conditioner Condenser Fan Motor
To determine if the condenser fan motor is working, use a multimeter to test the incoming voltage to the motor. If the condenser fan motor is receiving the correct voltage, but the motor still won’t run, you should inspect the capacitor, if applicable, for any bulging or leaking. You can also use a multimeter to determine if the capacitor can hold and release its charge. If the capacitor appears to be in good condition, replace the condenser fan motor.
Highly Likely
05 - LG Air Conditioner Fan Motor
The fan blades might be scraping against the blower housing. Air conditioners have a fan blade in the front and a fan blade in the rear. Check both fan blades to ensure that they are not rubbing against the housing. If the blades aren’t rubbing against the housing and the fan motor is still noisy, check the fan motor bearings for wear. If the bearings are worn, replace the fan motor.
Highly Likely
06 - LG Air Conditioner Blower Wheel
Wiggle the blower wheel to see if it wobbles on the motor shaft. If the blower wheel is loose, try tightening or replacing the set screw screw if it has one. If blower wheel still isn’t stable, replace the blower wheel altogether.
Common
Frequently Asked Questions
Why is my LG air conditioner making a loud noise?
What causes a window air conditioner to make a rattling noise?
Is a noisy LG air conditioner compressor a serious problem?
How do I test an LG air conditioner fan motor that is noisy or not running?
How do I find the right replacement fan blade, blower wheel, or motor for my LG air conditioner?
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