How to Clean Your Aircon Filters in 6 Simple Steps: Follow Our Easy Guide

Keeping your air conditioner filters clean is one of the easiest ways to ensure your system runs efficiently. However, it's a chore many people ignore.

Over time, dust, dirt and allergens build up in the filters, reducing airflow and making your aircon work harder. This not only increases energy consumption but can also lead to poor indoor air quality.

The good news? Cleaning your aircon filters is a quick and simple task that anyone can do at home. With just a few basic tools and a little time, you can improve your aircon’s performance, reduce your energy bills, and breathe cleaner air. In this guide, we’ll walk you through six easy steps to clean your filters properly.

Follow these steps regularly, and your air conditioner will stay in top shape for years to come.

1. Turn Off the Air Conditioner

Before you start cleaning your aircon filters, the first and most important step is to turn off the unit. This ensures your safety and prevents any electrical hazards while you’re handling the filters.

Running an air conditioner with missing or improperly placed filters can also allow dust and debris to enter the system, potentially damaging the internal components.

If your aircon is a wall-mounted or split system, simply switch it off using the remote or the power button on the unit. For extra precaution, turn off the power supply at the circuit breaker. This is especially important if you’re dealing with a ducted system.

Taking a few seconds to switch off the power can save you from unnecessary risks. Once the aircon is off and unplugged (if possible), you can move on to the next step − locating and removing the filters for a thorough clean.

2. Locate and Remove the Air Filters

Before you can clean your aircon filters, you need to find and remove them. The location depends on the type of air conditioner you have:

• Split system air conditioners – Open the front panel of the indoor unit. The filters are usually located just behind the panel and can be gently pulled out.
• Window air conditioners – Look for a removable panel at the front of the unit. The filter is typically behind this cover and can be slid or lifted out.
• Ducted air conditioners – The filter is usually found inside the return air grille on the ceiling or wall. Open the grille and carefully pull out the filter.

Once you’ve located the filters, remove them gently to avoid damage. If they’re covered in dust or debris, handle them carefully to prevent spreading dust around your home. Now, you’re ready to start cleaning.

3. Vacuum the Filters to Remove Dust

Once you’ve removed the aircon filters, the first step in cleaning them is to get rid of loose dust and debris. The easiest way to do this is with a vacuum cleaner. Using a soft brush attachment, gently run the vacuum over the filter’s surface to suck up dirt, pet hair and other particles.

This step is important because it prevents excess dust from turning into sludge when you wash the filters later.

If you don’t have a vacuum, you can also use a dry microfiber cloth or tap the filters lightly to shake off any loose dust. However, be careful not to bend or damage the filter material.

Regular vacuuming between deep cleans can help keep your aircon running efficiently for longer. Once you’ve removed as much dust as possible, you’re ready for the next step − washing the filters with warm water and mild detergent.

4. Wash the Filters with Warm Water and Mild Detergent

Once you’ve vacuumed off loose dust, it’s time to give your aircon filters a deeper clean by washing them with warm water and mild detergent. Follow these simple steps:

• Fill a sink or bucket – Use lukewarm water and mix in a small amount of mild detergent, like dish soap. Avoid harsh chemicals that could damage the filter material.
• Soak the filters – Let them sit in the soapy water for about 10–15 minutes. This helps loosen stubborn dirt and grime.
• Gently scrub if needed – Use a soft brush or sponge to lightly scrub any areas with heavy buildup. Be careful not to tear the mesh.
• Rinse thoroughly – Run clean water over the filters to remove all soap residue.
• Shake off excess water – Gently shake the filters to remove extra moisture before setting them aside to dry.

Now, let them air dry completely before reinstalling.

5. Let the Filters Dry Completely

After washing your aircon filters, it’s crucial to let them dry completely before putting them back in the unit. If you reinstall damp filters, they can trap moisture, leading to mould and bacteria growth, which can affect your indoor air quality and even cause unpleasant odours.

To dry them properly, place the filters in a well-ventilated area away from direct sunlight. Excessive heat can warp the material, reducing their effectiveness. A good option is to let them air-dry indoors near an open window or in a shaded outdoor space.

Avoid using a hairdryer or heater to speed up the process, as too much heat can damage the delicate mesh. Depending on the humidity, drying may take a few hours.

Once the filters are completely dry to the touch, they’re ready to be reinstalled. Taking this step ensures your aircon runs efficiently and keeps the air fresh and clean.

6. Reinstall the Filters and Turn the Aircon Back On

Now that your aircon filters are clean and completely dry, it’s time to put them back in place. Follow these simple steps to finish the job:

• Check the filters – Make sure they are fully dry before reinstalling. Even slight dampness can lead to mould and bacteria growth.
• Slide or clip the filters back in – Carefully place the filters back into their original position. Most filters easily slide in or click into place.
• Secure the panel or grille – If your aircon has a cover, close it properly to ensure a snug fit.
• Turn the power back on – Switch on your air conditioner and test it to ensure proper airflow.
• Enjoy cleaner, fresher air – Your aircon should now run more efficiently, helping you stay cool while reducing energy consumption.

Regular filter cleaning keeps your air conditioner working at its best − aim to do this every 2-4 weeks for optimal performance.

Simple Steps for Cleaner Air

Cleaning your aircon filters is a simple but essential task that keeps your system running efficiently and your indoor air clean.

By following these six easy steps, you can improve airflow, reduce energy consumption and extend the life of your air conditioner. Plus, a clean filter means fewer allergens and dust circulating in your home.

To keep your aircon in top shape, aim to clean the filters every two to four weeks, especially during peak usage seasons. If you have pets or live in a dusty area, more frequent cleaning may be necessary.

Regular maintenance helps prevent breakdowns and ensures your aircon operates at its best. So, set a reminder, follow these simple steps, and enjoy fresh, cool air all year round. Your air conditioner − and your wallet − will thank you.

Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.