Air conditioners<\/strong> can be excellent mold<\/a> breading grounds. dust<\/a> gets deposited on the cooling fins, then becomes damp because air conditioners condense water out of the air. Damp dust is a pretty good medium for growing mold. The mold may not grow all that well when the air conditioner is running and cold, but between cycles, and during longer periods when the air conditioner is not needed, the mold can have a real field day.<\/p>\n