3 Sounds Your AC Units Should Not Be Making

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Cleaning My Indoor Air

Up until a few years ago, I would get sick whenever the seasons would change. I couldn't figure it out, until one day when an HVAC contractor pointed out my filthy air filters. I am embarrassed to say it, but I didn't know that air filters had to be changed at all, and all of that filthy air was circulating through my home. After I changed the air filters and started to take care of my HVAC system, my allergies got a lot better and I didn't feel as sick. I want other people to understand the massive benefits of taking care of their HVAC systems, so I put up this website.


3 Sounds Your AC Units Should Not Be Making

26 April 2018
 Categories: , Blog

Heating and cooling your home is important. Not only does it keep your family comfortable through the varying seasons, but proper heating and cooling ensures your indoor air quality is healthy. Therefore, making sure your system is in proper working condition is imperative. Unfortunately, nothing is meant to last forever, so you may experience signs your system is in distress. If your outdoor unit is making one or more of the following sounds, it is most likely in distress and in need of repair.


Flapping is one of the most common sounds you may hear in your outdoor unit. Although common, the flapping should never be considered normal.

In most cases, the flapping stems from a piece of debris inside the unit. Leaves, twigs, clumps of grass or mud, or even a bird, frog, or snake could be lodged inside the unit's cage. If the debris or animal is left in place, air will not be able to properly flow through the unit, decreasing the efficiency of your system.

Make sure to disconnect power to your outdoor units before carefully removing the cover to inspect the interior. Clean away any visible debris, inspecting the unit's interior for other issues. It is also helpful to spray down the interior of your unit using your garden hose, which will wash away heavy dust and debris.


A loud banging coming from one or both of your outdoor units is also a sign of trouble. Again, this usually needs a simple fix that targets the blower assembly inside your unit.

The blower assembly pulls air into the unit and conditions it so it can be transported into your home through the ductwork. During this process, the blower motor's fan blades can loosen and warp, causing the banging sound inside your unit.

Replacing damaged fan blades will ensure the motor is working properly, preventing excessive use and added costs to heat and cool your home.


You will most likely hear a clicking noise when your system first turns off and on. However, a continuous clicking sound is another sign that there is a problem with your system.

A constant clicking is usually due to a defective relay. This electrical control is what turns your system on and off, helping condition your home in the most effective and efficient manner possible.

Experienced HVAC contractors or electricians will be able to disconnect the relay safely before replacing it with a new piece.

Your outdoor units can notify you of a problem affecting your system's operation. These 3 sounds are surefire signs there is an issue with your units.