Noisy AC HVAC Return Vent

Noisy AC HVAC Return Vent
Published: 03/03/2022

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In this quick video we’ll show you how to fix a noisy HVAC return air vent.

So, what happens is due to the volume of air passing through this type vent cover it causes a vibration of the fins or louvers resulting in the noise.

In order to correct this noise, it’s necessary to adjust the fins slightly to decrease the amount of turbulence if you will from the air flowing through the vent.

It’s a very simple process and only requires slight movement on some or all of the fins. It’s not necessary to get carried away so you might make a few adjustments and then give it a try.

Another tip before starting is you might want to wrap the end of your needle nose pliers if that’s what you are using with some tap to keep from scratching the fins.

We also noticed that the vent cover needed to be turned around. When approaching the vent and looking up in this case, you can see up into the return air vent. In this case, the vent cover simply needs to be turned around. Since this one was a bit dusty, we cleaned it while we had it down and then reinstalled it.

After installation, it required a bit more TUNING to completely eliminate that annoying noise…

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