Air Conditioner Return Vent Whistling

Everything was fine until the air conditioner came on.

Air conditioner return vent whistling.

When this is the case too much air is being forced into a confined space which can cause whooshing or whistling sounds. Why low airflow causes whistling. The air conditioner roars to life. Too many closed doors.

Fiberglass duct liner absorbs noise like a charm and i always make sure to install it especially in return. If you have one of the return air grilles pictured below in your ceiling or wall listen up. Air filters pick up unwanted contaminants in your home s air but when they are dirty they restrict the airflow process. The downside to the bend in the grille is a reduction in airflow and sometimes a nasty whistle.

Check the filter and change it if it looks like the one on the right in this picture. You re worried that you might not hear the doorbell if it rings. It will increase the air flow in those rooms and should reduce the pressure enough in the problem room to stop the whistling. Troubleshooting tips for a whistling air conditioner.

Another sign of poor ductwork and a culprit of noise coming from your air return vents is unlined return ducts. The easiest step to take is to replace your current air filter. 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.

Or your phone if it vibrates on the counter. Blocked return vent the return vent may be blocked due to dust or other debris. 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. But first let s look at how low airflow causes your air conditioning system to produce that whistling sound.

If so you could be experiencing low return flow which means that your return air vent is not getting enough air. Change your air filter. Do yourself a favor go out to a big box store and get a. Finally one solution that i used in a similar situation remove the vent completely in other rooms.

An a c blower pulling in air from. You have two kinds of vents in your home. This blockage produces higher pressure and air velocity inside of the vent which in turn produces a whistling sound. Increasing the size or quantity of the vents is an option but again not an easy one.

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. Now you can barely hear your music. The fins are angled to hide those ugly filters we put there to keep our coil and air clean. This reduced but did not eliminate the noise which gets louder if the.