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Top 8 Aircon Mould & Condensation Problems in Singapore
Every one of these is either a hygiene problem (mould on the aircon) or a physics problem (condensation on cold surfaces). Both are fixable — trick is telling them apart.
Quick Answer
The recurring aircon mould and condensation problems in Singapore homes are a musty smell from evaporator biofilm, black streaks on louvres, water dripping from the ledge or bulkhead, sweating trunking, a wet wall shared with a neighbour's aircon, mould in the drip pan from a clogged drain line, and cold-surface condensation on the ceiling around the unit. All of them come down to a surface sitting below dew point or a coil that never dries — servicing alone fixes only half of them.
Aircon leaking water onto the floor
#1 complaint. Blocked drainage or drip pan overflow. Flush drain hose.
Musty smell in the first minute of cooling
Cladosporium on blower wheel. Aircon mould servicing at S$90/unit.
Black streaks on the grille louvres
Mould on visible grille. Wash + coat fix.
Condensation dripping from the grille
Grille below room dew point. Shield22 Pro anti-condensation coating.
Aircon ledge / bulkhead sweating
Wall around aircon cold enough to condense. Paint bubbles, stains.
Neighbour's aircon making YOUR wall wet
Inter-flat condensation. One-side fix — no MCST needed.
Weak cooling + high electricity bill
Dirty coil, clogged filter, mouldy blower. Servicing pays for itself.
Recurring allergies whenever aircon runs
Spore load from unserviced unit. Symptoms resolve 2–3 days after service.
Ready to fix it?
Limited-time promo — Essential first full ceiling or wall surface is $199 (normally $299). Full mould removal + Gush MouldSeal sealer + Gush Core anti-mould paint, 6-month warranty.Frequently Asked Questions
- Why does aircon smell musty after servicing?
- General servicing (S$30–60) doesn't kill mould. Mould hygiene servicing (S$90/unit) does.
- Is aircon mould really causing allergies?
- Likely if symptoms start within minutes of aircon on.
- Can I clean the aircon myself?
- Filter and grille monthly — yes. Blower, drip pan, evaporator — no (dismantle + steam needed).
- How often should I service?
- Regular: quarterly. Coastal/ground-floor: every 3 months.
- Difference between mould and condensation?
- Mould is a living colony; condensation is water on cold surfaces. Often need fixing together.
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Documented mould remediation across HDB, condo, landed and commercial spaces.
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