Air Conditioner Return Vent Whistling

We ll go over these problems in more detail and discuss what you can do to fix them.

Air conditioner return vent whistling.

This reduced but did not eliminate the noise which gets louder if the. Blocked return vent the return vent may be blocked due to dust or other debris. Do yourself a favor go out to a big box store and get a. It will increase the air flow in those rooms and should reduce the pressure enough in the problem room to stop the whistling.

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. An a c blower pulling in air from. 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. If you have one of the return air grilles pictured below in your ceiling or wall listen up.

The fins are angled to hide those ugly filters we put there to keep our coil and air clean. Check the filter and change it if it looks like the one on the right in this picture. When this is the case too much air is being forced into a confined space which can cause whooshing or whistling sounds. Everything was fine until the air conditioner came on.

As a result your system s blower is essentially starved for air usually as a result of some type of blockage. And while you d like to concentrate on your book you can t. Increasing the size or quantity of the vents is an option but again not an easy one. Another sign of poor ductwork and a culprit of noise coming from your air return vents is unlined return ducts.

Now you can barely hear your music. Why low airflow causes whistling. The easiest step to take is to replace your current air filter. If so you could be experiencing low return flow which means that your return air vent is not getting enough air.

The downside to the bend in the grille is a reduction in airflow and sometimes a nasty whistle. Change your air filter. Or your phone if it vibrates on the counter. 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.

You ll have to turn up the volume. Too many closed doors. You re worried that you might not hear the doorbell if it rings. But first let s look at how low airflow causes your air conditioning system to produce that whistling sound.

This blockage produces higher pressure and air velocity inside of the vent which in turn produces a whistling sound. 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. Troubleshooting tips for a whistling air conditioner.