Reasons There’s Low Airflow From Your AC


As the summer heat intensifies, having a fully functional air conditioning system is crucial for comfort and well-being. However, you might find that your AC isn’t delivering the refreshing breeze you expect. Low airflow from your AC can make your home uncomfortable and signal underlying issues that need attention.

We handle air conditioning service in Vermont, so we understand the intricacies of HVAC systems and are here to help you diagnose and resolve these issues. Here are some common reasons for low airflow from your central AC’s vents and solutions to restore its performance.

1. Clogged Air Filter

One of the most frequent culprits behind reduced airflow is a clogged air filter. Over time, dust, dirt, and debris accumulate on the filter, restricting the airflow and making your AC work harder to cool your home.

Solution: Regularly check and replace your air filter, ideally every 1-3 months, depending on usage and the type of filter. This simple maintenance step can significantly improve airflow and efficiency.

2. Faulty Blower Fan

The blower fan is responsible for circulating air throughout your home. If it’s malfunctioning or damaged, it can’t push the air effectively, leading to weak airflow.

Solution: Inspect the blower fan for any visible issues, such as broken blades or a misaligned motor. If you notice any problems, it’s best to call a professional HVAC technician to repair or replace the blower fan.

3. Blocked or Dirty Coils

Your AC’s evaporator and condenser coils play a vital role in the cooling process. If these coils are dirty or blocked, they can’t effectively transfer heat, which reduces the system’s overall efficiency and airflow.

Solution: Schedule regular maintenance to clean the coils. A professional HVAC technician can safely and thoroughly clean the coils, ensuring optimal performance and airflow.

4. Electrical Malfunctions

Electrical issues within your AC system can also lead to reduced airflow. Problems such as a faulty capacitor, wiring issues, or a malfunctioning thermostat can prevent the system from operating correctly.

Solution: If you suspect an electrical issue, it’s crucial to contact a licensed HVAC technician. Electrical problems can be complex and dangerous to handle without proper training.

5. Incorrectly Sized System

An AC system that is too small or too large for your home can result in poor airflow. An undersized unit will struggle to cool your space, while an oversized unit may cycle on and off too quickly, preventing proper air circulation.

Solution: Ensure your AC system is appropriately sized for your home. If you’re unsure, an HVAC professional can perform a load calculation to determine the correct size for your needs.

6. AC’s Advanced Age

Like all mechanical systems, air conditioners have a finite lifespan. As your AC ages, its components wear out, leading to decreased efficiency and airflow. Older units may also use outdated technology that’s less effective at cooling your home.

Solution: If your AC is over 10-15 years old and frequently experiences issues, it may be time to consider a replacement. Modern AC systems are more energy-efficient and provide better airflow, improving your comfort and reducing energy costs.

Low airflow from your AC can be a frustrating problem, but it’s often a sign of underlying issues that can be resolved with regular maintenance and professional assistance. If you’re experiencing low airflow or other AC problems, don’t hesitate to contact us. Our experienced technicians are ready to diagnose and fix your HVAC issues, ensuring you stay cool all summer long.

Contact HB Energy Solutions for all your energy needs. HB Energy Solutions delivers peace of mind. 

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