Not all air conditioners are built the same when it comes to how much noise they make.
Some are so quiet you don’t even know it has turned on, while others can wake you up in the middle of the night.
Before racing out to buy a new air conditioner, let us look at some things a homeowner can do to quiet down a noisy A/C unit.
What is the Source of the Loud Noisy Air Conditioner?
The moving parts of an A/C unit are what make them noisy, mainly the compressor and the condensing fan motor.
While other components may also be noisy such as the refrigerant lines, the unit will usually not work if those have a problem.
The usual problem is the compressor or condensing fan motor with ways to fix these problems below.
3 Fixes for a Loud Noisy Air Conditioner Unit
- Compressor Sound Blanket
- Vibration Isolation Dampener Mounts
- Condensing Fan Motor
Example Universal Compressor Sound Blanket Wrap on Amazon
Brinmar SBUHD Universal-Fit Air Conditioner Compressor Sound Blanket Wrap (0421A)
Most A/C units don’t come with a noise suppressor blanket, but a few manufacturers do install them at the factory. Be sure to check if one has been installed already or not.
Installing a compressor blanket is not hard but requires removing a side panel or the top panel to access the compressor.
A compressor blanket is made of a thick noise suppressing material and simply wraps around the compressor, and can greatly reduce the noise they make.
A low-cost way to fix this problem is with vibration isolation dampener mounts which are nothing more than hard rubber fittings.
The dampener mounts are placed under the compressor where it is bolted to the unit, usually 3-4 bolts.
Dampener mounts are very effective if a compressor is vibrating badly.
Installing vibration mounts is not difficult but does require opening a unit and replacing each compressor bolt with the rubber vibration dampener ones.
If you go this route, be sure to get the correct bolt size. There are many sizes and styles to choose from.
Sometimes this is due to bad manufacturing or when the unit was shipped, somehow tweaked the casing the motor sits in.
A good HVAC technician will be able to replace the fan motor and get it to seat properly, getting it to quiet down.
The compressor motor is often simply bad and has worn bearings making it spin unevenly.
Condensing fan motors is a job that a handy Do-It-Yourself type can do.
Another problem with a condensing fan is if the fan blade itself has become damaged, making the motor spin wobbly and creating noise.
Fan blades and condensing fan motors can be bought on Amazon or eBay. If you do order the parts, be sure they match your unit.
There is no reason to have to live with a loud air conditioning unit with many ways to help quiet it down.
The first step is to locate the noise source, such as the compressor, condensing fan motor, or other components.
Usually, the problem will be either the compressor or condensing fan motor.
A do-it-yourself homeowner can fix many problems, but if in doubt, be sure to call a professional.
Have you experienced a loud, noisy air conditioner unit? Let us know your thoughts below.