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6 September 2026

Mould around air-conditioning units: the Cyprus connection

Quick answer

Air-conditioning units cause mould because they create condensation and cool nearby surfaces, and their filters and internal parts trap moisture and dust. In Cyprus's humid climate this is common. Keep filters clean, manage condensation drainage, and treat any mould on or around the unit.

Why AC and mould go together in Cyprus

Air conditioning is essential in the Cyprus climate, but it's also a frequent mould culprit. Units cool surfaces below the dew point, produce condensation, and their filters and internal components collect moisture and dust — food and water for mould, all in one place.

The warning signs

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A musty smell when the AC runs, black spotting on or around the unit and vents, and staining on the wall or ceiling near it. If the room smells damp only when cooling is on, the unit is the likely source.

What causes it

Blocked or dirty filters trapping moisture, a blocked condensate drain letting water sit, and cold surfaces near the unit where humid room air condenses. In humid coastal areas this happens faster.

Keeping it clear

Clean or replace filters regularly, make sure condensate drains freely, and don't let the unit sit unused and damp for long periods. Treat any mould on surrounding walls promptly. If mould keeps appearing around the AC or on nearby walls, an mould inspection checks whether it's the unit, condensation or the wall behind — and mould treatment clears established growth.

Musty AC or mould around the unit? book a €75 inspection or call +357 96 738151.

Frequently asked questions

Why is there mould around my air conditioner?
AC units create condensation and cool nearby surfaces, and their filters trap moisture and dust — ideal conditions for mould, especially in humid Cyprus.
Why does my AC smell musty?
A musty smell usually means mould or damp in the filters, internal parts or condensate drain. Clean the filters and ensure the drain runs freely.
How do I stop mould from my air conditioning?
Clean or replace filters regularly, keep the condensate drain clear, avoid leaving the unit damp and unused, and treat any mould on surrounding surfaces.
Can AC mould spread to my walls?
Yes — condensation and spores from the unit can lead to mould on nearby walls and ceilings. Treat it and address the unit to stop it recurring.

Keep mould from coming back

A monthly plan from €45, or book a one-off inspection.

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