How to Clean an Air Conditioner Filter

Extends System Lifespan

Dirty filters can strain the air conditioner's components, leading to wear and tear over time. Cleaning the filters regularly reduces this strain, prolonging the unit’s life.



Prevents Malfunctions

Accumulated debris can lead to overheating or even system breakdowns. Clean air conditioner filters help prevent these issues, reducing the need for costly repairs.



Maintains Consistent Cooling

Blocked filters can restrict air flow, making it harder for your air conditioner to cool your space effectively. Clean air conditioning filters promotes even and efficient cooling throughout your home.



Signs It's Time to Clean Your Air Conditioner Filter

Here are some signs that indicate it's time to clean your air conditioner filter:

Reduced Airflow

If you notice weaker air output from your air conditioner (AC), it could be due to a clogged filter restricting airflow.



Increased Energy Bills

A dirty filter makes your unit work harder, which can lead to higher energy consumption and utility bills.



Poor Air Quality

If you detect more dust, dirt, or allergens in the air or experience an increase in allergy symptoms, it may be due to a dirty filter.



Visible Dirt or Debris

If you can see dust or dirt on the filter or notice it looks grey or discoloured, it’s time to clean or replace it.



Unpleasant Odours

A dirty filter can trap moisture and cause musty or unpleasant smells when the air conditioning unit is running.



Frequent System Cycling

If your AC turns on and off more often than usual, it could struggle due to a dirty filter.



Long Time Since Last Cleaning

If it’s been several months since you last cleaned or replaced the filter, it’s probably time to do it again.



How to Clean an Air Conditioner Filter Properly

Cleaning your air conditioner filter is a simple process that can significantly improve the air circulation in your home. Follow these steps to keep your air conditioner unit running smoothly:



Turn Off the Air Conditioner

Before starting, turn off your air conditioning unit. This prevents electrical accidents and keeps dust from circulating while you are cleaning.



Locate the Filter

Find the air conditioning filter in your unit. It’s typically behind the front grille in window units, inside the return air vent in central systems, or behind a removable panel in the split system.



Remove the Filter

Carefully remove the filter to avoid releasing trapped dust into the air. Follow your air conditioner’s manual for proper removal instructions.



Inspect the Filter

Check the air filter for visible dirt, dust, or damage. If the filter is too worn or damaged, replace it instead of cleaning it.



Vacuum the Filter

Use a vacuum cleaner with a soft brush attachment to remove loose debris. This step is especially effective for pleated or non-washable filters.



Wash the Filter (If Washable)

If the filter is washable, soak it in warm water mixed with mild detergent. Gently scrub it with a soft brush, then rinse thoroughly to remove all soap.



Dry the Filter

Shake off excess water and let the filter air dry completely in a shaded, ventilated area. Never use direct sunlight or heat sources, as they may damage the material.



Reinstall the Filter

Once the filter is fully dry, place it back into the air conditioner. Make sure it fits snugly and aligns properly with the airflow direction markers.



Power On the Air Conditioner

Finally, turn your air conditioner back on to enjoy cleaner air and improved cooling efficiency. Regularly maintaining your filters allows your indoor unit to perform reliably over the long term.



Turn Off the Power

Before you start, turn off the ducted air conditioning system at the main power source to prevent injury or damage during the entire cleaning process.



Locate the Air Filter

To start cleaning your ducted AC filter, identify and locate the return air grille first. The ducted air conditioner filter is typically housed in the return air grille, which can be mounted on the ceiling, wall, or floor. The size and shape of the grille may vary depending on the system model.



Open the Return Air Grille

Carefully open the return air grille to access the air conditioning filter. This may require unscrewing a cover or sliding the grille panel out of place. Make sure you handle the air grille gently to avoid damaging any parts.



Remove the Filter

Gently remove the filter from the housing and make sure to pay attention to its orientation for proper reinstallation. Handle the air filter gently to avoid tearing or bending it.



Inspect the Filter

Check for dirt, dust, and debris buildup. If the air filter appears clogged, extremely dirty, or damaged, it's best to replace it rather than attempt to clean it.



Clean the Air Filters

• Vacuuming: Use a vacuum cleaner with a brush attachment to gently remove loose dust and debris.
• Washing: Rinse the filter under lukewarm water and use a mild detergent if necessary. Avoid using hot water as it can warp or damage the filter material. Use a soft brush for stubborn spots.
• Drying: Allow the filter to dry completely in a shaded, well-ventilated area before reinstalling it.



Reinstall the Filter

Place the clean and dry filter back into the grille, making sure it is aligned correctly. Then close the grille firmly to secure it in place.



Turn the System Back On

Turn the power back on for the air conditioning unit and test it to make sure it's working properly and the airflow is smooth.



Schedule Regular Maintenance

Regular cleaning helps maintain system efficiency. Schedule periodic cleanings or professional check-ups to keep your unit in top shape. Set a reminder at least every 3–6 months or more frequently if you have pets or live in a dusty area. However, if you need expert assistance, consider booking an air conditioning service in Wollongong to guarantee your system gets complete maintenance and runs at its best. This can help you avoid costly repairs and maintain a comfortable indoor environment year-round.

Common Mistakes to Avoid When Cleaning Air Conditioning Filters

Cleaning AC filters is essential for optimal performance, improved airflow, and a longer lifespan for your air conditioning system. Here are key mistakes to avoid:

• Not Turning Off the AC: Always switch off the unit to prevent electrical hazards.
• Using Hot Water: Hot water can damage and warp the filter. Use lukewarm or cool water instead.
  
• Cleaning Too Aggressively: Avoid harsh scrubbing or abrasive tools; use a soft brush or gentle rinse.
  
• Reinserting a Damp Filter: Make sure the filter is completely dry to prevent mould and damage.
  
• Using Harsh Chemicals: Stick to mild soap or specialised cleaners and avoid bleach or strong solvents.
  
• Ignoring Filter Type: Different air filters require different care. Follow the manufacturer’s instructions.
  
• Cleaning Too Often/Not Enough: Stick to the recommended cleaning schedule, usually every 30-90 days.
  
• Reusing Damaged Air Filters: Inspect for cracks or tears and replace air filters as needed.
  
• Using the Wrong Tools: Avoid abrasive brushes. Opt for a soft brush or vacuum attachment.
  
• Incorrect Installation: Install the filter according to the correct airflow direction, indicated on the filter.
  
• Neglecting Other AC Parts: Clean vents, coils, and the condenser to maintain efficiency.

When to Clean or Replace Your Air Conditioner Filter

Generally, it's recommended to clean the air conditioner filters in the indoor unit every two weeks. This keeps your AC system working well, improves quality of air, and helps save energy. High-usage periods, like summer, may require more frequent checks. If your air conditioner is not used often, consider cleaning or replacing the filter every 6 to 12 months.

Takeaway

Cleaning your air conditioner filters is essential to keep your air conditioning system running efficiently. Not only does it improve indoor airflow but it can also lower your energy bills and prevent potential system damage.

If your system continues to blow warm air or isn't operating efficiently after cleaning the air filters, it might be time to have your air conditioning system inspected. Contact AUSONE for professional servicing for your air conditioning system. We also supply, install and upgrade AC units.