How to Clean Your AC Filter for Optimal Performance

Is your air conditioner working overtime to maintain your desired temperature? It might be time to check your AC filters!

Keeping your AC unit in top shape is crucial for maintaining a comfortable and healthy environment. One of the most effective ways to do that is by regularly cleaning or replacing the air filter. A clean filter not only enhances your HVAC performance but also improves the overall air quality in your home.

This blog will provide a step-by-step guide for cleaning your AC filters. It will also discuss why regular filter maintenance is crucial and answer some of the most commonly asked questions about AC filter care.

Why Should You Clean Your Air Filter?

• Air filters play a vital role in maintaining indoor air quality by capturing harmful particles and pollutants. Over time, these contaminants can build up and clog the filters, causing harmful particles to be reintroduced into the air. This can cause headaches, dizziness, and irritation of your eyes, nose, and throat.
• Clogged air filters also cause airflow problems. Reduced airflow means your air conditioner has to work harder to maintain the desired temperature, which can decrease efficiency and increase energy bills. The reduced efficiency of your air conditioner can also cause your HVAC system to depreciate, reducing its lifespan.

Types of Air Conditioner Filters

There are three main types of AC filters:

• Disposable Filters

Disposable air filters, usually made of paper or cardboard, are designed to be replaced rather than cleaned. When they become dirty, they should be thrown away and replaced with new ones. These filters are inexpensive and can be purchased in bulk for convenience, allowing for easy replacement several times a year. However, if you’re running low on replacements, it might be worth considering reusable filters as an alternative. When choosing a filter, look for one with a high MERV rating (Minimum Efficiency Reporting Value), which indicates how well the filter captures small particles from the air in your home.

Note: Avoid cleaning disposable filters, as moisture can promote mold growth.

• Reusable Filters

Reusable filters can be cleaned, but it’s important to note that not all are washable. Always consult the manufacturer’s instructions before attempting to clean them, as some filters may require specific cleaning methods or materials. For those that are washable, you can often use soap, vinegar, or water to clean the filter effectively. Proper maintenance of reusable filters can enhance their lifespan and improve the efficiency of your air conditioning system.

• Washable Filters

A washable filter, also known as an electrostatic filter, can be soaked, rinsed, and washed to remove dust, dirt, and other debris. These filters typically have a higher upfront cost compared to disposable ones. However, by investing in washable filters, you reduce the need for frequent replacements, making them a more economical and environmentally friendly option over time. Additionally, maintaining washable filters can improve the efficiency and longevity of your air conditioning system.

Filter Cleaning Materials You’ll Need

The first step in the AC filter cleaning process is to gather your supplies.

Here’s what you will need:

• AC Manual
• Screwdriver
• Vacuum Cleaner
• Warm Water
• Soft Detergent/Soap
• Vinegar
• Baking Soda

How to Clean AC Filter: 5 Steps

There are five simple steps you will need to follow to clean an AC unit filter.

1. Turn off the AC Unit

Before cleaning the air filter, always turn off the air conditioner to prevent unfiltered air from circulating throughout your home and to avoid any accidents.

You can do this by switching off your AC power button, using your thermostat, or turning off the circuit breaker that supplies power to the air conditioner.

Note: Never attempt to remove the filter while your unit is still powered on.

2. Remove the AC Filter

The location of the air filter depends on the type of air conditioner. Consult the user manual or visit the manufacturer’s website for specific details about your AC model. Most filters either pop out or slide out easily. However, some models may have clips that need to be removed before you can take the filter out.

Note: Some units may have multiple filters, so take your time to thoroughly read the manual and inspect the air conditioner.

• If you want to clean your window AC filter or your mini-split one, they usually have a front panel that slides out of the way for easy access to the filter.
• For central air conditioners, the filter is near the return vent, either in a ceiling, wall, or floor. To remove the AC filter, you may need to unscrew an access panel.

3. Vacuum the Filter

For those who regularly maintain their air conditioners, vacuuming the filter can effectively remove most of the accumulated dust and debris. Use the brush attachment on your vacuum cleaner to clean the filter thoroughly. If the filter still looks dirty after vacuuming, you may need to wash it to eliminate any stubborn dirt or grime.

4. Wash the Filter

To thoroughly clean your air filter, you can put it in a water and vinegar solution. You can also use a liquid detergent instead of vinegar. Let it soak for 1-2 hours. Rinse it gently with a faucet and then set it aside against a hard surface to dry.

For an alternative cleaning method, sprinkle baking soda on the filter before rinsing with a hose. Be sure to avoid any pressurized nozzles that could damage the filter.

Allow the filter to dry for about 20 to 30 minutes to minimize the risk of mold growth.

5. Reinstall the Filter

After the filter is fully dry, examine it for any damage, such as holes or tears. If you find any issues, it’s best to get a new one. If the filter is in good condition, reinstall it in the air conditioner. Close the filter’s access panel and turn the air conditioner back on to enjoy the clean air.

Clean Other AC Parts

The filter isn’t the only part of the air conditioner that requires regular cleaning. Homeowners should also clean the coils, drain pan, and outdoor AC unit to keep the air conditioner functioning properly.

• Coils can be cleaned using warm water and a detergent solution. You can also vacuum them with a brush attachment. Work slowly to avoid damaging the coil fins. If any fins are bent, use a fin comb to straighten them.
• Condensate drainage channels, which allow accumulated condensation to drain away from the air conditioner, should be cleaned about once a year. Slide a stiff wire through the clogged drain line to break up any debris.
• Maintaining a clean outdoor unit is crucial for ensuring the efficient operation of your air conditioning system. Regularly removing debris such as leaves, dirt, and twigs from around the unit helps prevent blockages and allows for proper airflow. For window units, use a damp microfiber cloth to clean the outside part.

Related: How to Clean an Air Conditioner?

FAQs

• How Often Should You Clean Your Filters?

It’s recommended that you clean your air conditioner filter every two weeks (roughly 200-250 hours of use) and get it replaced every 3-4 months.

If you run your AC continuously, you might want to check and clean the filters more frequently.

• How Can I Tell if the Filter Is Dirty?

One simple method to check if your AC filter needs cleaning is the “white sheet test.” Hang a clean white sheet approximately 5 inches away from one of your air vents and leave it there for at least an hour. If the sheet starts to turn gray, it’s a sign that your air filter is dirty. The darker the sheet becomes, the more dust and debris are on the filter. If the sheet turns significantly gray, it’s time to clean or replace the filter to ensure better air quality and efficient air conditioner performance.

Other signs include dust accumulation around the air vents, strange AC odors, unexplained increases in electricity bills, and poor air quality. Additionally, if your air conditioner starts to overheat or malfunction, it could be a sign that the AC filter needs to be cleaned or replaced.

To make things easier for yourself, you can invest in a smart thermostat for mini-splits, like the Cielo Breez Max. These mini-split thermostats have a feature that tracks your air filter cleaning status. You’ll get a notification on your phone when it’s time to clean the filter, making it easier to stay on top of maintenance.

• Is It Okay to Clean an AC Filter With Water?

Not all air conditioner filters are washable, so it’s important to check the user manual or inspect the filter to determine if it can be cleaned with water. Look for any specific cleaning instructions provided by the manufacturer. If the filter is washable, you can rinse it with water to remove dust and debris.

• Can I Run My AC Without a Filter for One Day?

You can run your air conditioner without a filter for a short period, but it is not advisable to do so for more than 6 to 8 hours. Operating your AC without a filter for extended periods can damage the unit and significantly reduce the air quality inside your home.

• Does Cleaning the AC Filter Make Your Home Feel Colder?

A clogged AC filter obstructs airflow, trapping cold air inside your AC unit and preventing it from circulating properly in your home. Cleaning your filters will restore proper airflow, allowing cold air to circulate efficiently throughout your home.

The Takeaway

Keeping your AC filters clean is crucial for maintaining the efficiency and air quality of your air conditioning system. By adhering to the recommended cleaning methods for your filter type, you ensure that your air conditioner operates at its best. For added convenience, consider investing in a mini-split thermostat that provides timely reminders for filter maintenance. With these practices in place, you’ll enjoy a more efficient and healthier home environment year-round.