Your AC runs nearly nonstop from May to October. That steady hum makes it one of the most attractive pest shelters on your property. Air conditioner insects like ants, cockroaches, wasps, and scorpions use the cool, damp spaces inside your system to nest, feed, and slip indoors. The cost goes beyond a few bugs. It means fried contactors, clogged drain lines, and pests riding your ductwork into bedrooms.