Q: I have a swamp cooler that no longer works. It blows air, but the air is not cool. The unit used to make a trickling noise but no longer does. What can be done to bring the cool air back? A: Swamp ...

Evaporative coolers—commonly known as “swamp coolers” but also called evaporative air conditioners, desert coolers, wet air coolers and even swamp boxes—have been around in their modern form since the ...