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Is My AC Units Airflow Obstructed?

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Is My AC Units Airflow Obstructed?

Posted On: May 24, 2024

Is My AC Units Airflow Obstructed?

Determining if your AC unit's airflow is obstructed is crucial for ensuring it operates efficiently. Here are some steps and signs to help you identify any airflow obstructions:


Steps to Check for Obstructed Airflow

  1. Inspect Air Filters


    • Visual Inspection: Check the air filter for dust and debris buildup. A clogged filter is a common cause of reduced airflow.
    • Replace or Clean: Replace disposable filters or clean reusable ones if they appear dirty.
  2. Check Vents and Registers


    • Open and Unobstructed: Ensure all supply and return vents are open and free from obstructions such as furniture, drapes, or rugs.
    • Airflow Test: Place your hand near the vents to feel if air is flowing freely. Weak airflow may indicate a blockage.
  3. Examine the Ductwork


    • Visual Inspection: Look for visible signs of damage or disconnections in the ductwork.
    • Seal Leaks: Seal any leaks or gaps with duct tape or mastic sealant.
  4. Inspect the Outdoor Unit


    • Clear Debris: Ensure the area around the outdoor unit is clear of debris, plants, and any other obstructions.
    • Check Fins: Inspect the condenser fins for dirt or damage and clean them gently with a soft brush if needed.
  5. Monitor System Performance


    • Temperature Differential: Measure the temperature difference between the air entering the return vent and the air exiting the supply vents. A significant drop in temperature can indicate a problem.
    • Listen for Noises: Unusual noises from the blower fan or ducts can indicate obstructions or mechanical issues.

Signs of Obstructed Airflow

  1. Reduced Cooling Efficiency


    • If your AC is running but not cooling your home effectively, obstructed airflow may be the cause.
  2. Increased Energy Bills


    • Higher-than-normal energy bills can indicate your AC is working harder than necessary due to restricted airflow.
  3. Hot and Cold Spots


    • Inconsistent temperatures or noticeable hot and cold spots in different rooms suggest uneven airflow distribution.
  4. Frost Build-Up on Evaporator Coils


    • Ice on the evaporator coils can be a sign of insufficient airflow, causing the coils to become too cold and freeze.
  5. Weak Airflow from Vents


    • If you notice that the airflow from your vents is weaker than usual, it could indicate a blockage somewhere in the system.

What to Do If You Find Obstructions

  • Replace or Clean Filters: Regularly replace or clean air filters to prevent clogs.
  • Clear Vents and Registers: Ensure all vents and registers are open and unobstructed.
  • Clean Ductwork: Have your ducts professionally cleaned if you suspect a significant buildup of dust or debris.
  • Clear Outdoor Unit Area: Regularly clear the area around your outdoor unit to maintain proper airflow.
  • Professional Inspection: If you cannot identify the source of the obstruction or if the problem persists, contact a professional HVAC technician for a thorough inspection and service.

By performing these checks and addressing any issues, you can ensure that your AC unit operates efficiently, providing optimal cooling performance and energy efficiency.



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See What Our Customers Are Saying:

by Private User on Twintech Heating and Cooling

Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
Thank you for a job well done.

by Darren, Pickering on Twintech Heating and Cooling

My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.

by Private User on Twintech Heating and Cooling

I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.

by Robert, Ajax on Twintech Heating and Cooling

We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.

by John Armstrong, Pickering on Twintech Heating and Cooling

I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !

by Private User on Twintech Heating and Cooling

Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.

by Bill Edmondson on Twintech Heating and Cooling

Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.

by Private User on Twintech Heating and Cooling

A dear late cousin of mine recommended this company and I have been happy with the service.

by Private User on Twintech Heating and Cooling

We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.

by W1n5t0n1987! on Twintech Heating and Cooling

Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!

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See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.

by Linda on Twintech Heating and Cooling

Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!

by Robert Rogers on Twintech Heating and Cooling

Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.

by Robert Mizuno on Twintech Heating and Cooling

We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!

by Ruth on Twintech Heating and Cooling

TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!

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