Blocked ducts are one of the most common causes of HVAC failure. They can lead to inefficient operation, overheating, and lack of air circulation. In this article, we will discuss 7 causes of blocked ducts in your HVAC system that needs hvac maintenance lakeside mt.
1. Operating the Unit at the Wrong Time
An HVAC unit will not work as efficiently during times of day it’s not designed for. For example: If you leave your A/C on and go to sleep, the unit won’t be using its most efficient operating point (most likely low speed and high fan). It also won’t go through a self-clean cycle, which results in more bacteria and the development of biofilm within the unit. The result: A blocked duct, low airflow, or poor air quality.
2. Some Areas are Too Hot or Too Cold
The cooling/heating coil in the unit should produce an even temperature across the entire airstream. If one side of the airstream is very hot (or cold), it may cause condensation (which leads to bacteria growth) and result in a blocked duct. These include running the unit when no one is home (unoccupied mode), use of the incorrect size/ efficiency filter (keep it clean to keep airflow strong), and adjusting the thermostat to a higher temperature than needed.
3. Incorrect Filter Type and Size
Filters come in different sizes and efficiencies for a reason, so it’s important to choose the right one. For example: Using a low-efficiency filter will result in increased airflow resistance which can cause a blocked duct or reduced airflow. In addition, any kind of cloth/reusable filter must be cleaned or replaced as often as needed to maintain proper airflow and indoor air quality.
Learn more: Is Air Duct Cleaning Worth It?
4. Inadequate Ventilation
Ventilation is important for a number of reasons, including removing excess humidity from the airstream, providing good indoor air quality, and keeping your system clean. A system not properly installed may have gaps around the return. This means some of your cooled/heated air is leaking outside instead of being forced through the unit for use. A lack of ventilation can also contribute to high humidity levels, which leads to bacteria growth and can result in a blocked duct.
5. Dirty Coils
A dirty evaporator coil will affect airflow across the unit and will result in an obstructed airstream and poor indoor air quality. This is why it’s important to schedule professional HVAC maintenance each year before the harsh winter months.
6. Obstructions Within the System
The airstream should be unobstructed from the supply to the return. Any obstructions will result in a reduction in airflow and poor indoor air quality. Items that can fall into this category include pet bedding, toys, debris from construction or pest infestation, etc.
7. High Operating Pressure Due to Concentrated Areas of Use
A blocked duct can also be caused by an HVAC system operating at high pressure due to concentrated areas of use. For example: If heavy furniture is placed in front of the return air grille, it will push the airflow away from where it’s needed and reduce the airflow to other areas (including where it’s needed most) in the room. An HVAC unit that is too close to a wall or leaving an exterior door open while the unit is running can also create high pressure, which may cause a blocked duct.
This article is for informational purposes only. Actual maintenance and repair should be performed by a professional who has experience with HVAC units in Atlanta. If you want to add anything or comment on this article, please comment below, and we will reply as soon as possible.
