Air Conditioner Return Vent Whistling

Change your air filter.

Air conditioner return vent whistling. The fins are angled to hide those ugly filters we put there to keep our coil and air clean. Troubleshooting tips for a whistling air conditioner. When this is the case too much air is being forced into a confined space which can cause whooshing or whistling sounds. An a c blower pulling in air from.

And while you d like to concentrate on your book you can t. We ll go over these problems in more detail and discuss what you can do to fix them. Now you can barely hear your music. You re worried that you might not hear the doorbell if it rings.

Dirty air filter a dirty filter acts like a barrier to return air forcing the blower to work harder and longer to circulate air say hello to a larger electric bill. I recently had an air conditioning system installed in a house i m building and have a problem with a whistling noise in the return duct. The air conditioner roars to life. Everything was fine until the air conditioner came on.

Fiberglass duct liner absorbs noise like a charm and i always make sure to install it especially in return. Air filters pick up unwanted contaminants in your home s air but when they are dirty they restrict the airflow process. Finally one solution that i used in a similar situation remove the vent completely in other rooms. It will increase the air flow in those rooms and should reduce the pressure enough in the problem room to stop the whistling.

Why low airflow causes whistling. You have two kinds of vents in your home. Do yourself a favor go out to a big box store and get a. Too many closed doors.

This reduced but did not eliminate the noise which gets louder if the. The installer was notified and his employees attempted to correct the problem by installing an additional smaller return duct in my office which is located near the larger return. Check the filter and change it if it looks like the one on the right in this picture. This blockage produces higher pressure and air velocity inside of the vent which in turn produces a whistling sound.

The downside to the bend in the grille is a reduction in airflow and sometimes a nasty whistle. Blocked return vent the return vent may be blocked due to dust or other debris. Increasing the size or quantity of the vents is an option but again not an easy one. You ll have to turn up the volume.

As a result your system s blower is essentially starved for air usually as a result of some type of blockage. The easiest step to take is to replace your current air filter. But first let s look at how low airflow causes your air conditioning system to produce that whistling sound. If you have one of the return air grilles pictured below in your ceiling or wall listen up.