$49 / month O.A.C Including Install
$49 / month O.A.C Including Install

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 Bill, Whitby on Twintech Heating and Cooling

Reasonable price and the workmanship was prompt and timely and the employees were great to deal with.

by Nadia, Toronto on Twintech Heating and Cooling

The sales process was friendly, informative, and very consultative. They worked hard to earn our business by taking a careful look around our home to assess our needs, providing a lot of information about the product, and answering all our questions and finding the right solution for our home at a competitive price. They prepared us very well for what to expect on installation day, and the installation went very smoothly - no surprises, all very professional! They gave us a call after installation to ensure we were happy with the work. We're very happy that we chose to work with TwinTech to get our new furnace.

by Private User on Twintech Heating and Cooling

Twintech promptly responded to request for quotation. They were thorough and helpful in explaining options. The quote was very competitive. Installation of new furnace was very professionally completed. Excellent work.

by Rita, Scarborough on Twintech Heating and Cooling

When our old oil furnace finally broke down we decided it was time to finally convert to natural gas and finally install central air conditioning at the same time. Knowing it was going to be a significant investment for us, we wanted to make the right choice. Twintech came highly recommended by a friend and we were not disappointed. From the first contact with the salesperson, until the final touches on the installation, we were so pleased with their service. Everyone from the company was so friendly, efficient and a pleasure to deal with. Best of all, the cost was very competitive. We would certainly recommend Twintech to anyone requiring HVAC work in their home.

by Bob S, Pickering on Twintech Heating and Cooling

Mitch from Twintech came out for our annual furnace inspection. We found him to be friendly, conscientious & he left the work area clean. We were also very impressed with the thoroughness of the job he did. This is the 2nd job we’ve had Twintech do for us & have been very happy with the results for each. We highly recommend this company. Thank you, Mitch, Dave & Greg.

by Brent L on Twintech Heating and Cooling

Work was done on schedule, professionally, according to quote and with minimal inconvenience to building users. Very happy with the end result. The only area for improvement from my experience - need more timely quoting process.

by Karen on Twintech Heating and Cooling

The team was great! Very knowledgeable, professional and extremely helpful. A few days after install the unit didn’t seem to be working, user error, but within minutes of contacting them..on a Saturday.. a tech was on the phone troubleshooting with us. I highly recommend Twintech for your cooling or heating needs. They stand by their products and a pleasure to deal with.

by Rob on Twintech Heating and Cooling

During the hottest week in the summer our old A/C decided to call it quits. I called Twintech Heating & Cooling after receiving a referral from a family member; came highly rated for being an honest, family-run business, who appreciates their customers. Dave was able to accommodate my hectic schedule and book a late evening appointment to walk through the specifics. Greg and Mitch arrived exactly on time a few days later, were very polite and friendly, and within a couple of hours had a new unit up and running. I also received a follow-up call to ensure we were happy with the Amana.

by Linda Robinson on Twintech Heating and Cooling

They were on time and very professional. I'm so glad I decided to go with Twintech, thanks!

by Famcam1953 on Twintech Heating and Cooling

Timely and appreciated - this was during the hottest days this year when our Air and Furnace way.
Efficient. Professional. No BS or overselling. What was promised, was delivered at a cost-effective price point.
Down to earth.

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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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