Airflow Problems with Your Furnace: What Are the Most Common Causes?

furnace repairs

One of the most significant issues with furnace airflow problems is that they can sneak up on you—they don’t lead to erratic behavior or make odd noises. Most homeowners only notice low airflow issues when they get an unusually high energy bill.

Common Causes of HVAC Airflow Problems

Airflow problems cause your heater to run longer than necessary to reach the temperature on your thermostat. Your heating bill will reflect that extra usage when this happens for a prolonged period. Please consult with a local HVAC service company to identify poor airflow issues and resolve them before more significant problems arise.

Dirty or Clogged Filters

Suppose HEPA (high-efficiency particulate air) filters aren’t replaced regularly. In that case, they can build up dust, pet fur, and other airborne contaminants that lead to clogged air filters—and can result in costly furnace repairs. Make sure to check and replace your air filters regularly to maintain optimum performance and keep your furnace in top shape.

Low airflow is only one of the issues that a blocked or dirty air filter can cause, so be sure to check this before you call in a furnace repair. Air filter replacement is one of the easiest ways to maintain your furnace and prevent restricted air flow and mechanical failure.

Air Vent Returns

Most homes feature a closed-loop heating system that allows warm air to circulate throughout the house, keeping the temperatures balanced throughout. If certain rooms don’t have the proper amount of air returns installed, it can cause them to pressurize, limiting air circulation and leading to imbalanced temperatures.

A properly balanced HVAC system helps reduce energy costs while maintaining a constant temperature in every room—to keep you comfortable through the coldest months.

Obstructed or Damaged Air Ducts

Older air ducts can become clogged, damaged, or develop other obstructions over time due to several factors. Leaks, water damage, dust buildup, and loose insulation can penetrate ductwork and create a clog.

Leaks cause hot air to diffuse before it can reach the air registers, resulting in a furnace that has to work overtime. This additional wear and tear leads to higher energy costs and necessary damage. A professional inspection can test airflow performance and identify potential obstructions or damage. Regular air duct cleaning can also improve your indoor air quality.

common causes of HVAC Airflow Problems

Incorrectly Sized Vents

Installing ducts and vents requires proper sizing for the square footage, and if your ductwork is improperly sized, it can lead to unnecessary headaches down the road. If your ducts are too large, this can reduce airflow and prevent your home from heating properly. 

If the furnace is too large for your ducts, it can cause overheating, short cycling, and other issues that increase the need for furnace repair services. Be sure to have a professional HVAC technician inspect your ducts if you believe you’re experiencing restricted airflow or have trouble heating your home evenly.

Broken Blower Fan

Understanding the importance of your ducts is only one aspect of your furnace and heating system. The blower fan pushes the heated air through your system, but it can break down over time. Common furnace problems with older blower motors and fans are caused by overheating due to obstructed airflow. Other issues with blower fans can be caused by mechanical damage when components are bent, cracked, or worn down over time. A basic furnace tune-up can resolve these issues.

Contact Air Pro: Your Local Air Conditioning Contractor

Air Pro Heating & Cooling has been delivering quality work in Southern Washington and Northern Oregon for more than 20 years and is your trusted HVAC contractor for all furnace repairs, servicing, and furnace replacement needs. Reach out today, and one of our HVAC technicians will help you identify and solve any furnace issues or breakdowns you’re experiencing. Our goal is to keep the cool air and cold spots out of your home so you can stay warm and cozy during the cold winter months.

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