7 Signs Your AC Needs Cleaning:

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March 25, 2024

7 Signs Your AC Needs Cleaning:


In the sweltering heat and sticky humidity of Hong Kong, our trusty air conditioners become our best friends. It goes without saying that keeping them in tiptop shape is essential. But how do we know when they need a deep cleanse? Here are a few tell-tale signs it might be time to clean your AC’s. 


1. It Isn’t As Cool As It Used To Be

Do you find yourself asking “why is my air conditioner not cold?”

One of the first signs that your air conditioner needs attention is a decrease in airflow. You might notice that the air coming from the vents isn’t as strong or cool as it used to be. The culprit might just be the build up of dust and debris clogging up the filters or vents, obstructing proper air circulation and making it harder for your AC to cool your space effectively.


2. Some Rooms Feel Cooler Than Others

Are you constantly changing the thermostat, yet some rooms remain uncomfortably warm? If your AC is struggling to distribute cool air evenly, it could be due to a dirty unit. When dirt accumulates on the evaporator coils or condenser unit, it hampers the heat exchange process, leaving you with reduced cooling capacity and hot spots in your home.


3. Your Aircon Smells Strange

Nothing ruins the comfort of a cool breeze quite like a bad smell. A foul odour emanating from your air conditioner is not only unpleasant but also indicative of underlying issues. 

Mould, mildew, and bacteria thrive in dark, damp environments, like the interior of your AC unit. As these contaminants build up over time, they can produce musty or foul-smelling odours which indicate that your AC is overdue for a thorough cleaning 


4. There Is Excessive Moisture or Water Leakage

Have you noticed unusual amounts of moisture or any water leakage around your air conditioner? If the answer is yes, it could signal a clogged condensate drain or frozen evaporator coils – both of which are often caused by dirt buildup that prevents proper drainage and airflow. Ignoring these issues can lead to water damage and mould growth, compromising both your AC’s efficiency and your indoor air quality.


5. Higher Energy Bills

Have you noticed a spike in your energy bills even though you haven’t changed how you cool your home? A dirty air conditioner consumes more energy to work efficiently, driving up your monthly utility costs. By not keeping up with regular cleaning and maintenance, you’re not just risking expensive repairs – you’re also paying more for worse performance 


6. Strange Rattling Noises

Is your AC making strange noises like rattling, buzzing, or banging? These sounds could indicate the presence of debris or loose components within the fan blades or the motor. Cleaning your AC can help remove this buildup, reducing the likelihood of such noises and ensuring that your unit operates smoothly and efficiently.


7. Increased Allergy Symptoms

If you or your family members are suddenly experiencing more allergy symptoms than usual, your AC might be to blame. A dirty AC can circulate allergens like dust, pollen, and pet dander more effectively, triggering allergies and respiratory issues. Don’t let your AC become a breeding ground for allergens – give it a thorough cleaning to improve indoor air quality.



Keeping your air conditioner clean is essential for maintaining optimal performance and indoor air quality. By paying attention to these common signs of a dirty AC unit, you can address issues promptly and prevent them from escalating into costly repairs or replacements. 


Enjoy cool comfort all summer long! Call Breathe Easy TODAY: +852 9887 7273

Goodbye, heat waves! Hello, clean fresh air.