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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 Eric Y, Greenbank on Twintech Heating and Cooling

Dave was great in helping me get the proper units for my property, as well as getting them installed. The installers arrived when they said they would, and completed the project on time, and professionally. If I needed another furnace, I would use Dave again.

by Ed B., Whitby on Twintech Heating and Cooling

I have known Greg and Grant Dainty for many years and have used their company for my house and business. I recommended them also for my parents and sister and they all have been very satisfied with the quality of work for a reasonable price. I just recently had them install a new HVAC system in an older house and was very pleased with their work. Craig in Pickering. After meeting with various heating and air conditioning contractors I was referred to Twin Tech Heating and Cooling through a family member. Greg and Grant arrived at my home and provided me with an estimate and a plan as to how they were going to remove and replace my furnace and air conditioner. On the day of install Greg and Grant arrived at my home on time and were very professional and extremely courteous as to any questions or concerns that I had. The removal and install was truly professional and the attention to detail was exactly what I was looking for. I’ve seen many installs from other contractors and I couldn’t be any happier to have had such a clean looking install. The sheet metal work, ducting and venting all look fantastic. Upon completion Greg and Grant left me feeling extremely happy and very fortunate of a job well done. Thanks again Twin Tech!!

by Floreene in Whitby on Twintech Heating and Cooling

My old furnace had finally broken down for the last time when contacted twintech to have a new furnace installed…They were prompt, knowledgeable and very reasonably priced. They did such a great job i tell all my friends and family about this company.

by Damien McIsaac. Ajax on Twintech Heating and Cooling

To whom it may concern, I recently had TwinTech (Greg and Grant Dainty) replace my furnace and service both my gas fireplaces and air conditioning unit. They were professional, courteous and very fair in their pricing. I would gladly recommend TwinTech to anyone needing work done. I can be contacted at 905-626-XXXX.

by Blair N. - Toronto on Twintech Heating and Cooling

My Fiancé and I have relied on Twintech Heating and Cooling now for the better part of the last 10 years. In that time, Greg has installed a furnace, an air conditioner, and a heat-pump at our residence in Toronto. In each instance Greg and his team were a pleasure to deal with. They were courteous and professional throughout the whole process and the quality of their work is first rate. Our experiences have always been extremely positive and we have referred his services numerous times to our friends and family. Without hesitation, I would recommend Greg and TwinTech Heating and Cooling to anyone looking to service or replace their existing heat/AC equipment

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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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