Mould in an air conditioner: what you can clean, and when to stop
Switch the unit off, clean or replace the filter you are meant to reach, and book a technician if the smell stays or you can see growth inside the unit. Do not dry-brush coils. First Light is for the filter frame and any nearby wall or reveal you can reach, not for hidden coils.
The usual Australian scene is a split-system over a bedroom window, and a musty blast when cooling first cuts in after a humid week.
Where mould sits in a split system
The user filter, the condensate drain, the coil, and sometimes the wall or reveal behind the unit. Window units and ducted systems follow the same rule: you can service a user filter. You do not pull the casing open and brush spores off a coil.
Clean the filter safely
Take the filter out as the maker shows you, wash or treat the frame and the screen you are allowed to handle, dry it fully, and refit it. Wear a P2 or N95 mask. Do not shake a dry, dirty filter around the room.
The filter and the room, not the hidden coil
First Light for the filter frame and nearby painted surfaces you can reach. Lab tested: 99.2% on direct contact. The Protection Kit is for the bedroom or living room the unit sits in. A diffuser does not clean a coil.
Shop First Light, from A$39.99 Shop the Protection Kit, from A$79.98
When to call a technician
A smell that returns after a filter clean, visible growth inside the casing, a dripping tray, a ducted system, or a rental unit your agent should service. That is the stop line.
The room still has to be dry
An air conditioner is not a dehumidifier in every mode. See do dehumidifiers stop mould. If the complaint is the smell, use what stops that musty mould smell. If the bedroom itself is going mouldy, use why is my bedroom so mouldy.
Questions people ask
Can I clean mould in an air conditioner myself?
You can clean the user filter. Leave coils, drain pans you cannot see, and ducting to a technician. Do not dry-brush spores into the room.
Will a diffuser fix a mouldy air conditioner?
No. A diffuser does not clean a coil. The Protection Kit helps the room the unit sits in. The machine still needs a proper clean.
Why does my air con smell musty when I first turn it on?
Moisture sits in the unit and on the filter. Clean the filter, run a dry or fan mode if the maker says you can, and get the unit serviced if the smell stays.
Aurala is a Gold Coast business. Shop First Light or shop the Protection Kit.
