Skip to Content

Why Is My Heater’s Airflow So Weak?

A person huddled up in an orange blanket near a heater.

Have you noticed a weak or nonexistent stream of hot air coming from your vents? This is a common issue with several possible causes. Our team at Valairco is here to discuss likely reasons for low heater airflow and what can be done to fix this problem.


Most often, blockages are to blame for decreased airflow. An accumulation of dust and debris in your air filters and heating system can significantly impede airflow. This is why it is crucial to keep up with maintenance and cleaning to avoid these blockages.


If you notice weak airflow, it may be because hot air is escaping your heating system before entering your home. There may be leaks or breakages in your air ducts that allow hot air to exit the system before it makes it into your home through your vents.

Closed Vents

This one is a simple fix! Check the vents in your home to ensure they are open. You may be shocked that one or multiple vents are closed, thus not dispersing the hot air your heater produces.

Old Age

Weak airflow may be a sign that your heater is reaching the end of its lifespan. As heating systems age, they become less efficient and even less safe. If your heating system is over 15 years old, it may be time for a replacement.

Fix Your Airflow Issues with the Help of Valairco

It’s important that your heating system is in tip-top condition for the cold winter months. If you notice weak airflow or other issues with your heating system, contact our team at Valairco. We offer 24/7 emergency services and are equipped to handle various HVAC services. Reach out today to schedule a service or get an estimate to replace your heating system.