You don't need any special tools. Just your phone torch and 30 seconds. Here's exactly what to look for.
Show Me How →Most split systems have a flap that lifts up from the front. It should open easily — if it doesn't, check the sides for release clips. Don't force it. You're looking to expose the filters and the fan barrel behind them.
Filters slide out — usually two of them. They should be white or light grey. If they're dark grey, brown, or have visible black spots, mould is already present. Hold them up to a light — you should be able to see through them. If not, they're clogged.
This is the most important step. With the filters out, shine your phone torch directly at the cylindrical fan barrel and the metal coils behind it. Look carefully — mould often hides in the crevices where the fan blades meet the barrel. Check the coils for black dots, grey patches, or green discoloration.
Get close to the open unit. A clean AC smells like... nothing. Maybe faint metal. A mould-contaminated AC has a distinct earthy, musty smell — like wet socks or a damp basement. If you've noticed this smell when the AC runs, you've already got your answer.
Dirty to spotless — watch the full process
If you found mould — do not try to scrub it off yourself. Disturbing mould colonies without proper containment equipment (HEPA vacuum, antimicrobial treatment) spreads millions of spores through your house. You'll make the problem worse, not better. A professional clean takes about 45 minutes and we handle the containment.
If your torch test showed black dots, grey filters, or a musty smell — we can sort it in under an hour.
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