How an AC Air Handler Works and How to Maintain It

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Cleaning My Indoor Air

Up until a few years ago, I would get sick whenever the seasons would change. I couldn't figure it out, until one day when an HVAC contractor pointed out my filthy air filters. I am embarrassed to say it, but I didn't know that air filters had to be changed at all, and all of that filthy air was circulating through my home. After I changed the air filters and started to take care of my HVAC system, my allergies got a lot better and I didn't feel as sick. I want other people to understand the massive benefits of taking care of their HVAC systems, so I put up this website.

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How an AC Air Handler Works and How to Maintain It

24 January 2023
 Categories: , Blog


HVAC is a powerful system that is capable of heating and cooling your home. However, for the AC to circulate the conditioned air throughout your home, it needs to be taken by the air handler and circulated throughout your home. Understanding how this system works is important because if it fails you will not be able to heat and cool your home.

How the Air Handler Works

The air handler is connected to the return plenum. The system takes the air inside your home and sends it to the air conditioner. The air handler comes with a blower motor responsible for physically moving the air that needs to be heated or cooled.

The types of blowers available include single-speed, dual-speed, and multi-speed. The single-speed blowers are the least complex and the least expensive but are less efficient. By being able to operate at different speeds, a blower will use less energy when it is not necessary. They also adjust automatically.

Air Filtration

Besides conditioning your home, an AC system comes with the added bonus of removing particles from the air using a filter. It can remove dust, pollen, and other contaminants that can cause problems for your household.

The filter is also necessary because it protects your AC. However, you will want to make sure to clean the filter regularly because a dirty filter will cause your AC system to not function as efficiently. If your air handler is not coming on, this is often due to the filter becoming clogged.

Common Air Handler Issues

If the blower is not working correctly, the most common reason is that the connection between the thermostat and the blower has become covered in dust. After cutting the power to the air handler with a fuse box, you will then want to remove the cover and dust the inside of the fuse box.

Leaking Air Handlers

Some air handlers leak. When this happens, the conditioned air won't make its way into your home. You won't feel as comfortable and your AC will also have to work harder. A technician will inspect your ductwork and will find out exactly what is wrong with it.

Residential AC Repair Services

While there are many problems that can occur with an HVAC unit, it's an essential part of the heating and cooling of your home. But an AC maintenance contractor can come to your home, diagnose your system, and perform any necessary repairs.

Speak to a company like Mid Mississippi Heating & AC, LLC to learn more.