Midnight-itus. That would be my cat, who jumps onto the fridge whenever she hears my vacuum running or the garage door opening.

I have heard it called Flo-Beephobia after the Flo-Bee hair trimmer that attaches to your vacuum.

Someone said zuigerphobia. however I don't see it on the list. http://www.phobialist.com/

1) vacuum-phobia or vacuum-cleaner-phobia: "For the vacuum-phobic, try tempting him with a kid-sized toy version." http://www.whattoexpect.com/toddler/month-21.aspx "vacuum cleaner phobia" http://forum.grasscity.com/real-life-stories/24630-vacuum-cleaner-phobia.html "Does anyone have experience with roombas and vacuum-phobic dogs?" http://www.apartmenttherapy.com/ny/surveys/at-survey-the-roomba-018120 "When Jayne tricks the vacuum-phobic Simon into donning a spacesuit and joining the crew on the transport — which, to Simon's embarrassment, turns out to be pressurized — Mal takes advantage of his and the others' presence to send them off in teams to explore the ship, while he and Zoe head to a section that he suspects holds the real valuables. " http://en.wikipedia.org/wiki/Bushwhacked_(Firefly) "You should ask her why cats are afraid of vacuum cleaners because she is the number one vacuum phobic!" http://www.hummingbirdfarm.org/tulispeaks.html 2) kenophobia: If we want a Greek word root, we could use κενÏŒ "Greek - Noun κενÏŒ n. vacuum (region of space that contains no matter)" The word "kenophobia" exists already: "Kenophobia is a fear of empty spaces." It might be possible to include the concept of vacuum in empty, so that kenophobia would not just be the fear of places where there are no usual objects or persons, but where there is absolutely nothing (vacuum). The problem to find an accurate old Greek word for vacuum appeares because old Greek philosophers have ofter refusedthe concept of vacuum: "Historically, there has been much dispute over whether such a thing as a vacuum can exist. Ancient Greek philosophers did not like to admit the existence of a vacuum, asking themselves "how can 'nothing' be something?". Plato found the idea of a vacuum inconceivable. He believed that all physical things were instantiations of an abstract Platonic ideal, and he could not conceive of an "ideal" form of a vacuum. Similarly, Aristotle considered the creation of a vacuum impossible — nothing could not be something. Later Greek philosophers thought that a vacuum could exist outside the cosmos, but not within it." Source and further information: http://en.wikipedia.org/wiki/Vacuum