How Dust Build-Up Affects Your Air Conditioner
An air conditioner constantly draws in indoor air, so dust, hair and cooking grease accumulate on the filter and coils. This build-up blocks heat exchange and strains the compressor — cooling performance drops while electricity bills rise by 10–30%.
More importantly, the damp interior of an air conditioner is a breeding ground for mould. If you smell mustiness when it runs, the inside has likely gone mouldy — and continued use will spread mould spores throughout your home.
Recommended Cleaning Schedule
Dust filter: remove and rinse it with water yourself every 2 to 4 weeks.
Professional deep cleaning: once a year for most households, ideally before the summer cooling season. Homes with heavy usage, roadside dust or pets should clean every 6 to 9 months.
Professional Cleaning vs. DIY: What’s the Difference?
DIY cleaning usually only covers the filter and outer casing, but the real grime builds up inside — on the evaporator coils, fan wheel and drain pan. Professional cleaning uses high-pressure water and specialised solutions to strip the interior of mould, dust mites and grime.
After a proper clean, cooling is noticeably faster, airflow stronger and musty smells gone. It also extends the unit’s lifespan — and the electricity savings often cover the cleaning cost.
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