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Carrier Air conditioner is loud or noisy

If your Carrier air conditioner is loud or noisy, start with the parts most likely to create extra vibration, rattling, grinding, or humming. A Carrier air conditioner making noise often points first to a wearing compressor. The unit may keep cooling for years, but compressor replacement should be handled by a licensed professional. Next, check the dual shaft fan motor, since worn motor bearings can make the AC sound rough or loud. Damaged front or rear fan blades can also cause a window air conditioner noisy condition, especially if a blade is bent or rubbing the housing. If the condenser fan motor is noisy or not running correctly, test for proper voltage and inspect the capacitor before replacing the motor. A worn fan motor can create similar noise when its bearings fail. Finally, check the blower wheel for wobbling on the motor shaft or a loose set screw. Once you identify the failed part, enter your model number on RepairClinic.com to find the exact Carrier replacement part for your specific air conditioner.

01 - Carrier 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 - Carrier 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 - Carrier 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 - Carrier 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 - Carrier 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 - Carrier 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.
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Frequently Asked Questions

Why is my Carrier air conditioner making a loud noise?
Why is my Carrier window air conditioner rattling or scraping?
Should I replace the compressor if my Carrier AC is making a loud noise?
Can a bad condenser fan motor or capacitor make my Carrier air conditioner noisy?
How do I find the right replacement part for a noisy Carrier air conditioner?

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