How to Change Your AC Filter

Your air conditioner's filter is an essential part of its overall performance. It helps keep your AC system running efficiently and prevents dust, dirt, and other particles from entering the system. Over time, the filter can become clogged with debris and needs to be replaced. Fortunately, replacing an AC filter is a relatively straightforward task that most homeowners can do on their own.

What You'll Need

Before you start, make sure you have all the necessary materials. You will need a new air filter, a screwdriver (if necessary), and some gloves for protection.

Step 1: Locate the Filter

The first step is to find the filter. This may be in the return air duct, near the furnace, or in the blower compartment. Some filters are easily accessible while others may require removing screws or panels.

Step 2: Take Out the Old Filter

Once you've located it, take out the old filter from its housing. Depending on your system, this may involve unscrewing a panel or using a screwdriver to loosen up its frame. Be careful not to damage any wires or components as you remove it.

Step 3: Put in The New Filter

Before installing it, take a few moments to inspect it for any obvious damage or defects. If everything looks good then slide in your new filter into place and secure it with screws or clips.

Step 4: Check for Leaks

Once everything is installed, check around its edges for any gaps or leaks. If there are any gaps, use caulk or weatherstripping to seal them up.

Step 5: Clean Up

Finally, throw away any old filters and wipe down any surfaces that were touched during installation so as not to let dust and dirt enter your system.


Replacing your air conditioner's filter is an important part of keeping your system running smoothly. With just a few simple steps, you can easily replace your AC filter yourself and enjoy improved efficiency and better indoor air quality.