Here are decision cues and safe first steps for six common AC symptoms, to help you decide whether to clean first, check yourself, or book a fault inspection.
Work out whether it is the setting, dust, or a parts or refrigerant issue before choosing cleaning or an inspection.
Check the temperature setting and mode, and clean or check the filter for blockage.
If it is still not cold after cleaning, or there is icing or noise, book a fault inspection.
A blocked drain is the most common cause and can often be cleared during cleaning; installation slope issues need repair.
Switch off the unit and protect the area from water to avoid wetting appliances and floors.
If dripping continues or an installation or parts issue is suspected, arrange a check.
A musty smell usually comes from build-up and moisture, and a deep clean often improves it noticeably.
If the smell is strong, pause use and arrange a deep clean.
If odour persists after cleaning, the drain or ageing parts may be involved and need a further check.
Icing is a warning sign and continued running can make it worse, so switch off first.
Turn off the unit and let it thaw naturally; do not chip at the ice.
If icing returns after thawing, book a fault inspection.
A new or loud noise deserves attention; record the details before deciding.
If the noise is severe, switch off and note when and how it happens.
Persistent or clear noise should not be handled by opening the unit; arrange an inspection.
A blocked filter or obstructed outlet are common causes and can be checked first.
Check and clean the filter, and confirm the outlet is not obstructed.
If weak airflow persists, or there is noise or icing, professional diagnosis is needed.