4 Common Questions About Air Conditioner Air Filters

Have you ever wondered what makes the air from your A/C so cool and refreshing?

Air filters are an essential part of a fully functional A/C. Not only do they help purify air, they also protect your air conditioner so that it can continue to create a cool, comfortable home environment. 

In this article, we detail everything about how air filters work and what steps you can take to guarantee cool, clean air.

What is an Air Filter?

Air conditioner filters are square sheets typically made from cotton, cloth, paper, or fiberglass. Air filters have two main functions:

1. They trap and lock dirt and debris to improve your air quality and minimize the risk of allergy attacks and respiratory issues.
2. Filters prevent particles from entering your A/C’s internal components and clog important parts, mitigating damage and boosting efficiency. 

How Often Do Air Filters Need to Be Replaced?

For the best air quality, we generally recommend replacing your air filter every 1-3 months. 

Additionally, if you notice an unpleasant must coming from your A/C, this could be a sign that mold or mildew may be present in your unit. In this case, check the air filter as soon as possible.

How to Replace an Air Filter

Below is our step-by-step guide for changing A/C filters.

Step 1: Turn Off the Air Conditioner

Make sure the air conditioner is turned off before attempting to change the filter. This will prevent possible injuries and keep dust and debris from blowing into your home.

Step 2: Locate the Air Filter

The air filter is typically found in one of three places:

• In the return air duct or grille.
• In the air handler unit of the HVAC system.
• Behind the front grille of a window air conditioning unit.

Step 3: Remove the Old Filter

Start by opening the filter compartment. Depending on your system, you may need to unscrew or unclip the access panel or grille.

Carefully slide out the old filter, noting the direction of the arrows on the filter frame, which indicate the airflow direction.

Step 4: Check the Filter Size

Check the dimensions filter’s dimensions. These are typically printed on the side of the filter. Make sure you purchase the correct size replacement filter.

Step 5: Install the New Filter

Ensure the new filter is facing the right direction. The arrows on the frame should point in the direction of the airflow (usually toward the blower and away from the return duct).

Carefully slide the new filter into place, ensuring it fits snugly.

Step 6: Close the Filter Compartment

Replace the access panel or grille and secure it with screws or clips as needed.

Step 7: Turn the Air Conditioner Back On

Finally, turn the air conditioner back on.

Need Professional Help?

If you don’t feel comfortable changing your air filter yourself, call the pros at Pomona Plumbing, Heating & Air. In addition to changing filters, we offer full-service maintenance and inspections to keep your unit running at its best for years to come.

For assistance, call (909) 764-3214.