Keeping your home comfortable and your air conditioning system running smoothly starts with something simple—making sure to change the AC filter. A clean filter helps your AC work efficiently, saves energy, and improves the air quality in your home.
Luckily, the process is quick and easy, even if you’ve never done it before. In this guide, we’ll make sure you know which type to get, then walk you through the three simple steps to swap out your old AC filter and keep your system in good shape.
Why it’s Important to Change the Air Filter
Giving your AC filter a regular change is one of the simplest ways to keep your home comfortable and protect your air conditioning system.
A clean filter allows air to flow smoothly through the system, which helps your AC cool your home more efficiently. This can lower your energy bills, since the AC doesn’t have to work as hard to maintain the right temperature.
When they get clogged with dust, pet hair, or pollen, they block airflow and make the system strain to keep up. Over time, this extra strain can lead to costly repairs or even shorten the life of your AC.
Still, around 80% of Americans fail to change air filters monthly–but keeping the filter clean helps your system run smoothly and last longer.
Besides protecting your AC, changing the filter improves indoor air quality. Dust, pollen, and other particles can get trapped in a clogged filter, eventually circulating back into your living space.
How to Know the Type You Need
Before changing the AC filter, it’s important to choose the right replacement. Here’s how to make sure you buy the right kind:
- Check the size: Look at the side of your old filter for the size, or check your AC system’s manual to find the correct dimensions.
- Know the MERV rating: Filters are rated by their efficiency using the MERV (Minimum Efficiency Reporting Value) scale. A higher MERV rating captures smaller particles, but anything between 8 and 12 usually works well for most homes.
- Consider material: Filters come in different materials, like fiberglass or pleated filters. Fiberglass is cheaper but doesn’t trap as many particles, while pleated filters are better for improving air quality.
Step 1) Power Down Your AC
Before you start changing the filter, it’s essential to turn off your AC system for safety reasons. You don’t want the system running while you’re replacing the filter, as this can cause debris to be sucked into the unit.
To turn off your AC, just switch off the thermostat, or for added safety, flip the circuit breaker to cut the power.
Next, locate your filter compartment. Depending on your system, the filter is usually found behind a vent cover or inside the air handler. This might be in a return air duct, furnace, or the main air handler unit in your home. If you’re unsure, consult your AC system’s manual to locate it.
Step 2) Take Out the Old Filter
Once the AC is powered down and you’ve located the filter, it’s time to remove the old one. Carefully open the filter compartment and slide the old filter out. Take a look at it—if it’s gray, clogged with dust, or has any visible dirt buildup, it’s definitely time for a change.
A dirty filter is a clear sign that it’s been working hard to trap particles from your air. You should change your AC filter every 1-3 months, depending on factors like how often you use your AC, whether you have pets, and the air quality in your area. Homes with pets or smokers, for instance, may require more frequent changes.
Dispose of the old filter properly—don’t just toss it anywhere. These filters can contain trapped allergens and dust, so it’s best to seal it in a trash bag before throwing it away.
Step 3) Properly Install the New Filter
Now it’s time to install the new filter. Before you insert it, check for an arrow on the side of the filter that shows the correct airflow direction. The arrow should point toward the AC unit or blower, as it indicates how the air will pass through the filter. Installing the filter in the wrong direction can block airflow and reduce your system’s efficiency.
Slide the new filter into the compartment, ensuring it fits snugly. A loose filter won’t work effectively, so make sure it’s secure and in the right place.
Once the new filter is in, close the vent or access panel and turn your AC system back on at the thermostat or breaker.
Other Recommended Maintenance
While being able to change your AC filter is an important step in maintaining your system, there are a few other tasks you can do to ensure everything runs smoothly. Regular maintenance not only helps prevent breakdowns but also extends the life of your AC system. Here are a few things to consider:
- Clean the air vents: Dust can build up on your air vents over time, reducing airflow. Every few months, take a moment to wipe down your vents and remove any visible debris.
- Check your thermostat: Make sure it’s set correctly for the current season and replace the batteries regularly.
- Keep the outdoor unit clear: Your AC’s outdoor unit needs to have unobstructed airflow to function properly. Make sure there’s no debris, plants, or other objects blocking it.
When to Call a Professional
Even with regular filter changes, there may be times when your AC system needs a professional’s touch.
If you notice poor airflow, strange noises, or uneven cooling throughout your home, it could be a sign of a bigger problem. A licensed HVAC technician can perform a more thorough inspection of your system, checking for issues like refrigerant leaks, motor problems, or faulty components.
It’s a good idea to schedule annual maintenance with an HVAC professional. During these inspections, they’ll check for potential issues and perform routine tasks like cleaning the coils, checking refrigerant levels, and ensuring the system is operating efficiently.
Conclusion
Taking care of your AC system doesn’t have to be complicated. Changing your filter regularly is a simple task that goes a long way in improving your home’s air quality, reducing energy costs, and preventing costly repairs down the road.
If you’re unsure about the condition of your AC or want to ensure everything is working as it should, schedule an inspection with All Coast Home Inspections–we’re here to help you keep your home comfortable and running at peak performance.
