Ten Reasons Why Your HVAC System is Experiencing Airflow Issues

Easy Ways to Save Money During Winter
January 9, 2018
big ac unit
The Downside of an Oversized Unit
March 4, 2018
Show all

Ten Reasons Why Your HVAC System is Experiencing Airflow Issues

If you’re experiencing hot and cold spots throughout your home, a pressure imbalance (doors shutting by themselves, whistling noises, drafts), little to no air from your vents, or warm air flowing through your AC system, you’ve got a problem with airflow and this will need to be fixed ASAP. If the problem goes on for too long, you will experience compressor failure and once this occurs, you’ll need a new HVAC system. So why wait and spend more money when you can fix the problem now? Here are the top ten reasons why you’re experiencing airflow issues with your HVAC unit and what you can do to get your system running as it should again.

  1. Your condenser unit has become obstructed. Units that are located outside of your home can easily become damaged due to leaves and debris that collect around the unit. Units kept inside can easily become damaged by other equipment stored in the room. If it’s located in a room that’s cluttered, the unit can overheat due to little access to air. A simple solution to this problem is to make sure the area around your unit is clear.
  2. The vents and registers are blocked. As mentioned in the first cause, you’ll want to make sure the area is clutter-free so air can flow evenly into your home.
  3. The filters are clogged/dirty. Filters remove the dust and debris from the air while keeping it out of your system’s equipment and ducts. Dirty or clogged filters obstruct airflow, creating hot and cold spots, as well as stuffy air. Debris can also damage parts if left in the system’s equipment. Change your filter according to your system’s instruction manual and depending on how much you use it. Some have to change their filters as often as once a month.
  4. The ducts have blockages and/or leaks. If your filters are clogged, dust and dirt will travel into the ductwork. If the ducts are narrow, dust and dirt can easily collect them. Oftentimes, rodents, birds, and insects will build nests inside of ducts. Duct walls can develop holes or cracks, causing air to leak out. Both issues create problems with airflow. Call your local HVAC company to have your ductwork inspected and cleaned.
  5. The system has a faulty thermostat. You may need a replacement or it may be as simple as changing the battery.
  6. The fan has a slow motor. It’s possible the motor has slowed down due to a buildup of grime, dirt, dust, etc. In this case, the fan simply needs cleaning.
  7. The coils are filthy. The coils are designed to release heat, a job that can become quite challenging if they are filthy. This can easily occur due to being a part of an outdoor unit. If the coils become dirty, the unit has to work harder than usual to release the heat. To prevent this problem, coils should be cleaned once or twice a year.
  8. The unit is low on refrigerant. Airflow issues and reduced cooling is the result of your AC leaking refrigerant. Even if the leak is a slow one, it will decline the performance level of your unit over time. Call your local HVAC company to test your system for leaks so they can be quickly repaired and your unit will be back to normal in no time.
  9. You’ve chosen a unit that’s too big for your home. Units that are too large for your home can run inefficiently, cycling on and off, meaning they aren’t on long enough to remove the heat from the space. This creates a stuffy and uncomfortable atmosphere.
  10. Your system needs to be updated. If you have recently renovated or rearranged rooms in your home, you may need to update your HVAC system. The layout or sizing of the ductwork or equipment may not be able to cool the redesigned space as it should. You’ll find that ductwork changes can make a significant difference in airflow.