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Is My AC Units Airflow Obstructed?
Posted On: May 24, 2024
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
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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.
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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.
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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.
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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.
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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
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Reduced Cooling Efficiency
- If your AC is running but not cooling your home effectively, obstructed airflow may be the cause.
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Increased Energy Bills
- Higher-than-normal energy bills can indicate your AC is working harder than necessary due to restricted airflow.
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Hot and Cold Spots
- Inconsistent temperatures or noticeable hot and cold spots in different rooms suggest uneven airflow distribution.
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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.
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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:
Aug 8, 2025
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.
Aug 8, 2025
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!
Feb 18, 2025
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.
Feb 18, 2025
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!
Feb 18, 2025
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!
Feb 18, 2025
Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!
Feb 18, 2025
Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.
Aug 17, 2024
I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. Ive used the company in the past for my furnace so I was happy when I recognized Greg at my front door. Hes great and the service is always top notch. Id highly recommend using twintech for honest, superior service in the Durham region. Thanks!
Aug 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Aug 12, 2024
Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!
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