Skip to main content

A small Δ in airflow = A BIG impact on A/C performance

By Steve Schaeber, MACS manager of service training

Proper air flow across the heat exchangers in an air conditioning system is key to its being able to transfer heat efficiently. Problems with air flow can be caused by slow turning or inoperable fans, dirt and debris build up on evaporators, condensers and radiators, as well as missing or damaged foam insulation. It can also be caused by problems with air dams, scoops and fins. Poor airflow is a common undiagnosed cause of original compressor failure and comebacks following an A/C repair job.


Testing and inspecting these components for visual signs of blockage and damage should be one of the first steps taken when diagnosing A/C or engine cooling system performance issues. Reduced airflow through the condenser or radiator can result in premature compressor failure, poor A/C performance and engine/transmission overheating. Poor A/C performance after compressor replacement may not be associated with an airflow issue, especially when no obvious signs of engine overheating are evident. Therefore, a thorough evaluation of the system should be performed.



If you’re a service professional and not a MACS member yet, you should be!

Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit for more information.

You can E-mail us at .

To locate a Mobile Air Conditioning Society member repair shop in your area.

Click here to find out more about your car’s mobile A/C and engine cooling system.

Mobile A/C professionals should plan to attend MACS 2017 Training Event and Trade Show, February 15-18 at the Anaheim Marriott in Anaheim, CA.

Click here to see MACS current public training schedule.

The MACS website is located at



Leave a Reply

Your email address will not be published. Required fields are marked *