How To Change your AC Filter

How to Change Your Air Filter Step by Step

Changing your air filter is one of the simplest things you can do to help keep your HVAC system running properly. A clean filter helps maintain airflow, keeps dust and debris out of the system, and can help reduce unnecessary strain on your equipment.

For most homeowners, changing an air filter only takes a few minutes once you know where to find it.

 

Why Changing Your Air Filter Matters

Your air filter catches dust, dirt, pet hair, and other particles before they circulate through your home or reach your HVAC system. As the filter collects debris, it can become clogged and restrict airflow.

A dirty filter may contribute to:

  • Reduced airflow from your vents
  • Higher energy bills
  • More dust around your home
  • Your system running longer than normal
  • Additional wear on your AC or heating system

A clogged filter can also allow more dust and debris to reach other parts of your HVAC system. This buildup can contribute to problems with components such as the condensate drain line, potentially leading to clogs and water backups.

 

How Often Should You Change Your Air Filter?

How often you need to replace your filter depends on your home and HVAC system. As a general rule, changing your filter every 30 days is a good place to start.

You may need to replace it more often if:

  • You have pets
  • Someone in your home has allergies
  • Your system runs frequently
  • You are using your AC or heating system heavily

Checking your filter regularly can help you determine how quickly it becomes dirty.

 

What You’ll Need

You don’t need any special tools to change an air filter. You’ll just need:

  • A replacement air filter in the correct size
  • A place to dispose of the old filter

The filter size is usually printed along the edge of the existing filter. Check the size before purchasing a replacement.

 

Step by Step: How to Change Your Air Filter

1. Turn Off Your HVAC System

It isn’t always necessary to turn off your HVAC system, but it’s a good idea to turn it off at the thermostat before replacing the filter. This keeps the system from running while you’re removing and installing the filter.

2. Locate Your Air Filter

Your air filter may be located in several different places, depending on your HVAC system. Common locations include:

  • Inside a return air vent on a wall or ceiling
  • Inside the HVAC unit
  • In a filter slot where the return duct connects to the system

Look for a removable panel or a slot labeled “filter.”

3. Remove the Old Filter

Carefully slide the old filter out of its slot. Be prepared for some dust and debris, especially if the filter has not been changed recently.

Before throwing it away, take a look at how it is positioned.

4. Check the Filter Size and Airflow Direction

Check the replacement filter to make sure:

  • The size matches your old filter
  • The airflow arrow is pointing in the correct direction

The arrow should generally point toward the HVAC system, following the direction of airflow. Installing the filter backward can restrict airflow and reduce system performance.

5. Install the New Filter

Slide the new filter into place, making sure it fits properly and is seated securely.

The filter should fit snugly without being forced into the slot. Avoid leaving gaps around the edges.

6. Turn Your HVAC System Back On

Once the new filter is installed, turn your HVAC system back on at the thermostat.

Give the system a few minutes to start up and make sure air is flowing normally from your vents.

 

Simple Tips to Keep Your Air Filter Clean

A few simple habits can make filter changes easier:

  • Set a reminder to check your filter every 30 days
  • Keep a spare filter on hand
  • Check the filter sooner if you have pets or allergies
  • Replace the filter if it looks gray, dirty, or clogged
  • Make sure the airflow arrow is pointing toward the HVAC system

Regular filter changes can help maintain airflow and keep dust and debris from building up inside your HVAC system. They can also help prevent issues that may affect components such as the condensate drain line.

 

Need Help With Your HVAC System?

If you’re changing your filter regularly but still notice poor airflow, water around your HVAC system, or other problems, there may be an issue that a new filter won’t fix. Contact Us today, and our team would be happy to assist you.