Why does my air cooler smell stale or damp?

A stale or damp smell usually points to water left in the reservoir, dust in the filter or a cooler that has been stored without drying properly. It is worth dealing with promptly, because the tank can develop build-up if it is not emptied and cleaned regularly.

What to do

1. Switch off and unplug the appliance before any cleaning.
2. Empty the water tank completely and rinse it with fresh water. The supplied instructions state that the tank should be emptied and cleaned before storage and that water should not be left standing when the appliance is not in use.
3. Clean the filter if it appears dusty or clogged, then allow it to dry fully before refitting.
4. Dry the exterior and tank area before use, so moisture is not trapped inside the appliance.

Some manuals warn that microorganisms can grow in the water reservoir if the water is not renewed and the tank is not cleaned properly. That makes regular emptying and cleaning an important part of safe use.

Expected result

After cleaning, the smell should reduce once the appliance has run with fresh water and clean airflow passages. If the smell becomes stronger, turns smoky, or is accompanied by heat from the cord or plug, stop using the product immediately.

When to seek further help

If the smell remains after cleaning, or if you are unsure whether there is mould, residue or an electrical fault, do not continue using the appliance. Contact the retailer or store where the product was purchased for next steps.