How to change your furnace filter
1: Determine which size filter you need
The first thing you need to do is identify which kind of filter you have. After you have turned off your furnace, remove the existing filter, which is located just inside the furnace or inside the air return vent.
You should see an arrow on the furnace filter, which will indicate which direction the air flows. Use a sticky note or permanent marker to mark the direction of the airflow on the exterior of the furnace. This way you’ll always know the correct way to install the filter.
Once you’ve removed the filter, make note of its size on the cardboard frame, so you'll know which size to buy.
2: Find the right replacement
Now that you know what size furnace filter you need, all you have to do is purchase it. You can typically find furnace filters at home stores, hardware stores or online. If you're looking to save on costs, American Home Shield® offers members filters at discounted prices.
3: Install your new filter
When installing your new furnace filter, you’ll see markings that tell you which side of the filter should face the furnace. Slide the filter into place and put the cover back over it. Keep note of the date you changed the filter, so you know when to change it again.
And that’s that! Who knew changing a furnace filter would be so simple?
Other frequently-asked furnace filter questions
Is a furnace filter the same as an air filter?
Yes. The furnace and air conditioner typically share the same air handler.
What if I have a plastic-framed air filter?
If this is the case, you have a reusable filter. There's no need to replace this filter; just clean it periodically by removing it and spraying off the dust with a garden hose. Allow the filter to dry completely before putting it back in the furnace.
How often should I change my furnace filter?
You may think you only need to change your furnace filter once a year, but this can cause your furnace to work too hard, overheat and shut down. A good rule of thumb is to check the filter once a month. Hold your furnace filter up to the light. If you cannot see the light clearly, it is time to replace the filter.
Don’t Worry, Be Warranty
Home warranties from American Home Shield include member benefits like the ability to book HVAC tune-up services to help you maintain the efficiency and longevity of your heating and cooling systems. Our pre-season HVAC tune-up services include a detailed inspection and tune-up of your HVAC system by qualified Pros, who will focus on key components to ensure they are operating effectively. This service helps prevent unexpected breakdowns and costly repairs by identifying potential issues early on. It's a proactive approach that ensures you’re ready for the summer heat and winter chill, so you have peace of mind.
