Why Aircons Get Mouldy
Air conditioners create ideal mould conditions: they produce condensation, collect dust and organic matter, and have dark, enclosed spaces. Without proper maintenance, they become mould breeding grounds that spread spores throughout your home.
Maintenance Schedule
- Weekly: Wipe down the air outlet and check for visible mould
- Monthly: Clean or replace air filters
- Quarterly: Professional general servicing
- Biannually: Chemical wash with antimicrobial treatment
- Annually: Full overhaul including coil and drainage cleaning
Signs of Mould in Your Aircon
- Musty or unpleasant odour when running
- Visible black spots on vents or blower
- Allergic reactions worse when AC is on
- Increased dust or particles in air
- Water dripping or pooling near unit
Frequently Asked Questions
How often should I service my aircon to prevent mould?
Service your aircon at least every 3 months in Singapore's climate. Monthly filter cleaning is essential. For homes with mould sensitivity or high usage, quarterly professional chemical wash is recommended. Annual overhaul should include checking drainage and coil cleaning.
Can mouldy aircon make you sick?
Yes. Mouldy aircons distribute spores throughout your home when running. Symptoms include respiratory issues, allergic reactions, headaches, and eye irritation. People with asthma or allergies are particularly affected. If you smell musty odours from your AC, have it cleaned immediately.
What temperature setting prevents mould in aircon?
Set your AC between 24-26°C for optimal mould prevention. Extremely low settings (below 22°C) increase condensation when the unit cycles off, creating moisture that promotes mould growth. The 'dry' mode is excellent for humidity control without over-cooling.
Should I leave my aircon running to prevent mould?
Continuous running isn't necessary, but avoid short cycles. Run your AC for at least 30-minute periods to allow proper dehumidification. After turning off, use 'fan only' mode for 10-15 minutes to dry internal components. Avoid turning AC on and off frequently.