Recently I noticed the window AC that  installed last year was making noise. Vibrating the window sill. I immediately was irritated because it was such a pain to install in first place.

But I guess on the bright side, its also an opportunity to find out why and fix it. yay.  And an opportunity to pass it on.

Do window AC units vibrate?

Yes, window air conditioning units can vibrate. Due to a number of things. Things like an uneven installation, a  fan motor going out, or just plain dirt that has built up on it.

How do you Reduce Vibration on a Window AC?

There are several ways to reduce vibration in a window AC.

Here’s some things to think about.

1. Proper installation:

Make sure the unit is installed level and on a stable surface. This will help to prevent vibrations caused by an uneven installation.

This was the one for me. The whole AC seem to turn just a little, which made it seem extra loud.

2. Use anti-vibration padding:

Padding can be placed under the unit to help absorb and dampen vibrations.

Im not sure this is something you can buy specifically, but even a wash towel or something similar would work.

3. Tighten loose parts:

Check to make sure all bolts and screws are tight, and that the fan blades are securely attached to the motor. Loose parts can cause vibrations.

4. Clean the unit regularly:

 A build-up of dirt and debris can cause vibrations and can also damage the unit over time. Specifically, a dirty filter will make the unit run extra hard and cause vibrations.

5. Check the fan motor:

A malfunctioning fan motor can cause vibrations. If the motor is not running smoothly, it may need to be repaired or replaced.

6. Balance the unit:

 If the unit is still vibrating after trying the above methods, it may be unbalanced. Make sure its level a sitting solidly.

7. Support bracket check:

 Make sure that the support bracket is tight and secure, if the bracket is loose, it will cause the unit to vibrate.

By following these steps, you should be able to reduce the vibration and noise caused by your window air conditioning unit.

Conclusion: Do window AC units vibrate?

Even a properly installed Window AC will vibrate a little. But if it has become very noticeable, then something is not quite right.

The first thing to check when any air conditioner is not working right or vibrating, making noise , etc. is the filter. 

 Air conditioners need good air flow and without it, they can offer up a whole host of symptoms.
And its such an easy thing to check first before you going down the rabbit hole.