Is Your AC's Air Flow Getting Weak? Here Are the Possible Reasons

Last Updated on March 24, 2024 by Saira Farman

If you are reading this article, there is a good chance that you have noticed your AC’s air flow has gotten weaker lately. Although the weather might be to blame for some of it, there are other factors that can impact how much airflow your AC produces. 

For example, dirty filters or clogged coils may decrease the amount of airflow in your home and make it harder to cool down. We’ve compiled a list of things to check if you notice that your AC’s air flow has gotten weak. The reasons why an Air Conditioner (AC) stops producing enough cold air include:

Unopened dampers and registers

If the dampers and registers in your AC unit are not opened, it can prevent air from flowing throughout the entire home. Note that the dampers, which control air flow from the plenum going to the registers, are sometimes mistaken to be turned off.

Dirty Filters

Over time, dirt and dust can build up on the filters. This will decrease the airflow and make it harder for your AC to produce cold air. Be sure to check your filter every month and replace it if it’s dirty.

Clogged Coils

If the coils inside of your AC unit become clogged with dirt or other debris, this will also decrease the amount of airflow. To clean them, you’ll need to remove the front panel of your AC unit.

Blocked Vents

If furniture or other objects are blocking the vents in your home, this can prevent the cold air from flowing out properly. Make sure that all of the vents in your home are clear and open so that the air can circulate freely.

Malfunctioning Fan Motor

A faulty fan motor may not be able to circulate enough cold air throughout your entire home, so it’s important to replace any broken motors right away.

Blocked Condensate Drain Pipe

When water from inside of the coil evaporates into warm outdoor air, it creates excess heat, which then escapes through a metal tube at the back of the AC called a condensate drain pipe. If this drain pipe becomes blocked, the heat won’t be able to escape and will get trapped inside of your AC unit, causing a buildup of condensation.  

Clean out any dirt or other debris from the bottom every month so that it doesn’t block the flow of water down the tube.

Incorrectly-Sized AC Unit

If you have a portable or window air conditioning system that is too big for your space, this can impact the amount of airflow in your home. Be sure to check what size central AC unit will work best with the square footage of your room and keep an eye on it during hot summer months.

It is important to find the underlying cause of your AC’s air flow getting weak, so you can get it fixed. The longer you wait for a repair, the more money and effort will be required to fix this problem.

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