How to Clean an AC Filter? A Step-by-Step Professional Cleaning Guide

AC cleaning is an indispensable routine for healthy indoor air quality. Cleaning that is not performed regularly creates the conditions for dust, mites, mold spores, and bacteria to accumulate and spread into the environment. In this comprehensive guide you will find both the steps for cleaning the filter yourself at home and the deep-cleaning methods applied during professional maintenance.

What Does the AC Filter Do?

The AC filter traps dust, pollen, pet hair, and other particles in the air entering the indoor unit, both protecting the internal parts of the device and ensuring clean air is blown out. When the filter becomes clogged, airflow drops, cooling performance decreases, and unhealthy air is blown back into the room.

How Often Should Filter Cleaning Be Done?

For normal home use, filter cleaning is recommended every 2–4 weeks. If you have pets or live in an area with heavy traffic, cleaning every 1–2 weeks is appropriate. Monthly checks are sufficient during periods when the AC is not used heavily.

Cleaning the AC Filter at Home: Step by Step

Step 1: Turn Off the AC and Unplug It

For safe working, switch the AC off completely and cut the power. Switching it off with just the remote control is not sufficient; cut the power from the wall socket or the circuit breaker.

Step 2: Open the Cover and Remove the Filter

Lift open the top or front cover of the indoor unit. Filters usually slide out of their slots easily. Avoid pulling hard; they are fragile. For models with more than one filter layer, remove each one separately.

Step 3: Remove Dry Dust with a Vacuum Cleaner

Take the filters outside or to the bathroom. First remove dry dust using the vacuum cleaner on low suction. Skipping this step causes the dust to turn to mud during wet cleaning.

Step 4: Rinse with Running Water

Rinse the filter under a lukewarm tap from the inner surface outwards. Washing in the opposite direction to the airflow ensures dirt exits from the correct side of the filter. If needed, you can add a few drops of liquid detergent; it is important that the detergent is rinsed off completely.

Step 5: Dry in the Shade

Do not dry the filters in direct sunlight or with a hair dryer; there is a risk of deformation or melting. Wait in a shaded, well-ventilated area until completely dry (generally 1–2 hours). Fitting a wet filter to the AC causes mold to form.

Step 6: Reinstall and Check

Fit the completely dry filters back in place and close the cover. Run the AC and check that the airflow has improved and there is no bad odor.

What Is Different in Professional Cleaning?

Home filter cleaning is only the first line of defence. Dirt and biofilm that accumulates on evaporator coils, fan cylinders, and drainage channels can only be cleaned with professional equipment and special chemicals. Antibacterial treatment cannot be carried out under domestic conditions. For this reason, individual filter cleaning must be supplemented with professional maintenance twice a year.

Things to Bear in Mind After Cleaning

• Before fitting the filters back into the AC, make sure they are completely dry
• If the filter is damaged (holes, tears, deformation), replace it with a new one
• You can use antibacterial sprays designed for air conditioners to provide additional protection
• Note the cleaning date somewhere or add a reminder to your phone

Call our professional team for AC cleaning and treatment services. We come to your door with same-day service availability.