The air conditioner sold at Costco, Home Depot and more stores are being recalled due to possible mold exposure. Here's what to do if you own one.

Basic air-conditioner maintenance, such as regularly cleaning filters, can help prevent mold growth. Many window units have a light that indicates when cleaning is needed, but once or twice a month is a good rule of thumb.

The air conditioners resonated with consumers because of their unique design that allowed consumers to close their window — but which also allowed mold to accumulate.